Add test models page and synth presets.
This commit is contained in:
b1rdmania
@@ -1,4 +1,4 @@
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import type { NoteEvent, MotifConfig } from '../types';
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import type { NoteEvent, MotifConfig, SynthModel } from '../types';
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import { MIDIProcessor } from '../midi/MIDIProcessor';
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import { MIDIParser } from '../midi/MIDIParser';
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import { MIDIService } from '../services/MIDIService';
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@@ -27,13 +27,17 @@ export class MotifEngine {
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this.roleMapper = new RoleMapper();
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}
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async generateFromMIDI(events: NoteEvent[], transformMode: 'passthrough' | 'procedural' = 'passthrough'): Promise<void> {
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async generateFromMIDI(
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events: NoteEvent[],
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transformMode: 'passthrough' | 'procedural' = 'passthrough',
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model: SynthModel = 'nes_gb'
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): Promise<void> {
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// Initialize audio context using shared unlock (iOS compatibility)
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if (!this.audioContext) {
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this.audioContext = await unlockAudio();
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}
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this.synthesisEngine = new SynthesisEngine(this.audioContext, this.config);
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this.synthesisEngine = new SynthesisEngine(this.audioContext, this.config, model);
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if (transformMode === 'passthrough') {
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// Direct playback mode - play MIDI as-is without transformations
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@@ -107,7 +111,7 @@ export class MotifEngine {
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this.audioContext = await unlockAudio();
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}
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this.synthesisEngine = new SynthesisEngine(this.audioContext, this.config);
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this.synthesisEngine = new SynthesisEngine(this.audioContext, this.config, 'nes_gb');
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this.synthesisEngine.setupLayers(roleAssignments);
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}
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+378
@@ -0,0 +1,378 @@
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import { MotifEngine } from './core/MotifEngine';
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import { MIDIService } from './services/MIDIService';
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import { MIDIParser } from './midi/MIDIParser';
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import { SoundfontMIDIPlayer } from './synthesis/SoundfontMIDIPlayer';
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import { getAudioContext, isAudioReady, unlockAudio } from './utils/audioUnlock';
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import type { NoteEvent, SynthModel } from './types';
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class ModelsApp {
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private motifEngine: MotifEngine;
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private midiService: MIDIService;
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private soundfontPlayer: SoundfontMIDIPlayer | null = null;
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private searchBtn!: HTMLButtonElement;
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private songInput!: HTMLInputElement;
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private status!: HTMLElement;
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private resultsSection!: HTMLElement;
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private resultsBody!: HTMLElement;
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private playerSection!: HTMLElement;
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private selectedTitle!: HTMLElement;
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private selectedMeta!: HTMLElement;
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private soundfontPlayBtn!: HTMLButtonElement;
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private soundfontStopBtn!: HTMLButtonElement;
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private soundfontVolumeSlider!: HTMLInputElement;
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private motifBtn!: HTMLButtonElement;
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private motifStopBtn!: HTMLButtonElement;
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private motifVolumeSlider!: HTMLInputElement;
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private modelSelect!: HTMLSelectElement;
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private modelHint!: HTMLElement;
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private iosAudioBanner!: HTMLElement;
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private enableAudioBtn!: HTMLButtonElement;
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private iosAudioState!: HTMLElement;
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private nextResultBtn!: HTMLButtonElement;
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private searchResults: any[] = [];
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private selectedResultIndex = 0;
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private currentMIDI: { events: NoteEvent[]; metadata: any } | null = null;
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constructor() {
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this.motifEngine = new MotifEngine();
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this.midiService = new MIDIService();
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this.initializeUI();
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this.setupEventListeners();
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this.syncModelHint();
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}
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private async ensureAudioReady(): Promise<SoundfontMIDIPlayer> {
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const audioContext = await unlockAudio();
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if (!this.soundfontPlayer) {
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this.soundfontPlayer = new SoundfontMIDIPlayer(audioContext);
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}
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return this.soundfontPlayer;
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}
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private initializeUI(): void {
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this.searchBtn = document.getElementById('searchBtn') as HTMLButtonElement;
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this.songInput = document.getElementById('songInput') as HTMLInputElement;
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this.status = document.getElementById('status')!;
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this.resultsSection = document.getElementById('resultsSection')!;
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this.resultsBody = document.getElementById('resultsBody')!;
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this.playerSection = document.getElementById('playerSection')!;
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this.selectedTitle = document.getElementById('selectedTitle')!;
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this.selectedMeta = document.getElementById('selectedMeta')!;
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this.soundfontPlayBtn = document.getElementById('soundfontPlayBtn') as HTMLButtonElement;
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this.soundfontStopBtn = document.getElementById('soundfontStopBtn') as HTMLButtonElement;
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this.soundfontVolumeSlider = document.getElementById('soundfontVolume') as HTMLInputElement;
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this.motifBtn = document.getElementById('motifBtn') as HTMLButtonElement;
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this.motifStopBtn = document.getElementById('motifStopBtn') as HTMLButtonElement;
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this.motifVolumeSlider = document.getElementById('motifVolume') as HTMLInputElement;
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this.modelSelect = document.getElementById('modelSelect') as HTMLSelectElement;
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this.modelHint = document.getElementById('modelHint')!;
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this.nextResultBtn = document.getElementById('nextResultBtn') as HTMLButtonElement;
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this.iosAudioBanner = document.getElementById('iosAudioBanner')!;
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this.enableAudioBtn = document.getElementById('enableAudioBtn') as HTMLButtonElement;
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this.iosAudioState = document.getElementById('iosAudioState')!;
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}
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private setupEventListeners(): void {
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this.searchBtn.addEventListener('click', () => void this.handleSearch());
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this.songInput.addEventListener('keypress', (e) => {
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if (e.key === 'Enter') void this.handleSearch();
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});
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this.soundfontPlayBtn.addEventListener('click', () => void this.handleSoundfontPlay());
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this.soundfontStopBtn.addEventListener('click', () => this.handleSoundfontStop());
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this.soundfontVolumeSlider.addEventListener('input', (e) => {
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const volume = parseFloat((e.target as HTMLInputElement).value);
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this.soundfontPlayer?.setVolume(volume);
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});
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this.motifBtn.addEventListener('click', () => void this.handleMotif());
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this.motifStopBtn.addEventListener('click', () => this.handleMotifStop());
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this.motifVolumeSlider.addEventListener('input', (e) => {
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const volume = parseFloat((e.target as HTMLInputElement).value);
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this.motifEngine.setVolume(volume);
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});
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this.modelSelect.addEventListener('change', () => this.syncModelHint());
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this.nextResultBtn.addEventListener('click', () => this.handleNextResult());
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const enable = () => void this.handleEnableAudio();
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this.enableAudioBtn.addEventListener('click', enable);
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this.enableAudioBtn.addEventListener('touchend', enable, { passive: true });
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}
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private getModel(): SynthModel {
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const v = (this.modelSelect.value || 'nes_gb') as SynthModel;
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if (v === 'pre8bit' || v === 'nes_gb' || v === 'snes_ish') return v;
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return 'nes_gb';
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}
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private syncModelHint(): void {
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const model = this.getModel();
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const hint =
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model === 'pre8bit'
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? 'Ultra-sparse: mostly square/triangle, short gates, minimal polyphony.'
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: model === 'snes_ish'
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? 'Warmer: gentler filter + echo. More voices, smoother release.'
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: 'Chip: square/triangle/saw flavor, tight envelope, crisp attacks.';
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this.modelHint.textContent = hint;
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}
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private isIOSLike(): boolean {
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const ua = navigator.userAgent || '';
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const iOS = /iPad|iPhone|iPod/.test(ua);
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const iPadOS13Plus = /Macintosh/.test(ua) && (navigator as any).maxTouchPoints > 1;
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return iOS || iPadOS13Plus;
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}
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private updateIOSAudioBanner(): void {
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if (!this.isIOSLike()) {
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this.iosAudioBanner.style.display = 'none';
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return;
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}
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const ready = isAudioReady();
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this.iosAudioBanner.style.display = ready ? 'none' : 'block';
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const ctx = (() => {
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try { return getAudioContext(); } catch { return null; }
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})();
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if (!ready && ctx) {
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this.iosAudioState.style.display = 'block';
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this.iosAudioState.textContent = `Audio: ${ctx.state} @ ${ctx.sampleRate}Hz`;
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} else {
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this.iosAudioState.style.display = 'none';
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this.iosAudioState.textContent = '';
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}
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}
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private async handleEnableAudio(): Promise<void> {
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try {
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this.enableAudioBtn.disabled = true;
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this.iosAudioState.style.display = 'block';
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this.iosAudioState.textContent = 'Audio: enabling…';
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await unlockAudio();
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const ctx = getAudioContext();
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if (ctx.state !== 'running') {
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this.enableAudioBtn.disabled = false;
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this.iosAudioState.textContent = 'Audio still locked. Tap Enable Audio again.';
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return;
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}
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this.iosAudioState.textContent = `Audio: running @ ${ctx.sampleRate}Hz`;
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window.setTimeout(() => this.updateIOSAudioBanner(), 250);
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} catch {
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this.enableAudioBtn.disabled = false;
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this.iosAudioState.style.display = 'block';
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this.iosAudioState.textContent = 'Audio enable failed. Tap again, or disable Silent Mode.';
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} finally {
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this.enableAudioBtn.disabled = false;
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}
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}
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private updateStatus(message: string): void {
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this.status.textContent = message;
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}
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private hideResults(): void {
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this.resultsSection.classList.remove('visible');
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this.playerSection.classList.remove('visible');
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}
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private enablePlayerControls(): void {
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this.soundfontPlayBtn.disabled = false;
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this.motifBtn.disabled = false;
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this.nextResultBtn.disabled = this.searchResults.length <= 1;
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}
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private disablePlayerControls(): void {
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this.soundfontPlayBtn.disabled = true;
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this.soundfontStopBtn.disabled = true;
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this.motifBtn.disabled = true;
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this.motifStopBtn.disabled = true;
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this.nextResultBtn.disabled = true;
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}
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private async handleSearch(): Promise<void> {
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const songName = this.songInput.value.trim();
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if (!songName) return;
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this.handleMotifStop();
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this.updateStatus('Searching for MIDI files...');
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this.searchBtn.disabled = true;
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this.hideResults();
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try {
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const results = await this.midiService.search(songName);
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if (results.length === 0) {
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this.updateStatus('No MIDI files found. Try a different search.');
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return;
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}
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this.searchResults = results;
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this.selectedResultIndex = 0;
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this.updateStatus('Analyzing MIDI files...');
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for (let i = 0; i < Math.min(results.length, 3); i++) {
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const metadata = await this.midiService.parseMIDI(results[i].midiUrl);
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if (metadata) results[i].parsed = metadata;
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}
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this.displayResults();
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this.updateStatus(`Found ${results.length} MIDI files. Select one to compare models.`);
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this.updateIOSAudioBanner();
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} catch (error) {
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this.updateStatus(`Search error: ${error instanceof Error ? error.message : 'Unknown error'}`);
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} finally {
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this.searchBtn.disabled = false;
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}
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}
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private displayResults(): void {
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this.resultsBody.innerHTML = '';
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this.searchResults.forEach((result, index) => {
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const row = document.createElement('tr');
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if (index === this.selectedResultIndex) row.classList.add('selected');
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row.innerHTML = `
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<td>${result.title}</td>
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<td>${result.source}</td>
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<td>${result.parsed ? Math.round(result.parsed.durationSec) + 's' : '?'}</td>
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`;
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row.addEventListener('click', () => void this.selectResult(index));
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this.resultsBody.appendChild(row);
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});
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this.resultsSection.classList.add('visible');
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if (this.searchResults.length > 0) void this.selectResult(0);
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}
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public async selectResult(index: number): Promise<void> {
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if (index < 0 || index >= this.searchResults.length) return;
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this.handleMotifStop();
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this.selectedResultIndex = index;
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const result = this.searchResults[index];
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const rows = this.resultsBody.querySelectorAll('tr');
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rows.forEach((row, i) => row.classList.toggle('selected', i === index));
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this.updateStatus('Loading MIDI file...');
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this.disablePlayerControls();
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try {
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const midiBuffer = await this.midiService.fetchMIDI(result.midiUrl);
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if (!midiBuffer) throw new Error('Failed to fetch MIDI file');
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const events = MIDIParser.parseMIDI(midiBuffer);
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const metadata = result.parsed || MIDIParser.getMIDIInfo(midiBuffer);
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let actualDuration = metadata.duration || metadata.durationSec || 0;
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if (actualDuration === 0 && events.length > 0) {
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actualDuration = Math.max(...events.map(e => e.time + e.duration));
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}
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this.currentMIDI = { events, metadata: { ...metadata, duration: actualDuration } };
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const player = await this.ensureAudioReady();
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await player.load(events);
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this.selectedTitle.textContent = result.title;
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this.selectedMeta.innerHTML = `
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<strong>Source:</strong> ${result.source} |
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<strong>Duration:</strong> ${Math.round(actualDuration)}s |
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<strong>Tracks:</strong> ${metadata.trackCount} |
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<strong>Notes:</strong> ${events.length} |
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<strong>Tempo:</strong> ${metadata.tempo}bpm
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`;
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this.updateIOSAudioBanner();
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this.playerSection.classList.add('visible');
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this.enablePlayerControls();
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this.updateStatus('MIDI loaded. Preview, then switch models and generate.');
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} catch (error) {
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this.updateStatus(`Load error: ${error instanceof Error ? error.message : 'Unknown error'}`);
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}
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}
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private async handleSoundfontPlay(): Promise<void> {
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if (!this.currentMIDI) return;
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try {
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const player = await this.ensureAudioReady();
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await player.play();
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this.soundfontPlayBtn.disabled = true;
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this.soundfontStopBtn.disabled = false;
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this.updateStatus('Previewing MIDI...');
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} catch (error) {
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this.updateStatus(`Preview error: ${error instanceof Error ? error.message : 'Unknown error'}`);
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}
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this.updateIOSAudioBanner();
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}
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private handleSoundfontStop(): void {
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this.soundfontPlayer?.stop();
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this.soundfontPlayBtn.disabled = false;
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this.soundfontStopBtn.disabled = true;
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this.updateStatus('Preview stopped.');
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}
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private async handleMotif(): Promise<void> {
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if (!this.currentMIDI) return;
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try {
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await unlockAudio();
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this.updateIOSAudioBanner();
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const model = this.getModel();
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this.updateStatus(`Generating Motif (${model})...`);
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this.motifBtn.disabled = true;
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await this.motifEngine.generateFromMIDI(this.currentMIDI.events, 'procedural', model);
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await this.motifEngine.play();
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this.motifStopBtn.disabled = false;
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this.updateStatus(`Playing Motif (${model})...`);
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} catch (error) {
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this.updateStatus(`Motif error: ${error instanceof Error ? error.message : 'Unknown error'}`);
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this.motifBtn.disabled = false;
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}
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}
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private handleMotifStop(): void {
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this.motifEngine.stop();
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this.motifBtn.disabled = false;
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this.motifStopBtn.disabled = true;
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}
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private handleNextResult(): void {
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const nextIndex = (this.selectedResultIndex + 1) % this.searchResults.length;
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void this.selectResult(nextIndex);
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}
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}
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const app = new ModelsApp();
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(window as any).modelsApp = app;
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@@ -1,31 +1,52 @@
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import type { RoleAssignment, MotifConfig, SynthLayer, Role, NoteEvent, ChordEvent } from '../types';
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import type { RoleAssignment, MotifConfig, SynthLayer, Role, NoteEvent, ChordEvent, SynthModel } from '../types';
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export class SynthesisEngine {
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private audioContext: AudioContext;
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private config: MotifConfig;
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private masterGain: GainNode;
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private postGain: GainNode;
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private model: SynthModel;
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private layers: Map<Role, SynthLayer> = new Map();
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private roleAssignments: Map<Role, RoleAssignment> = new Map();
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private isPlaying = false;
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private schedulerIntervalId: number | null = null;
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private startTime = 0;
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private nextEventIndex = new Map<Role, number>();
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private activeVoiceCount = 0;
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private maxVoices: number;
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private effectCleanup: (() => void) | null = null;
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constructor(audioContext: AudioContext, config: MotifConfig) {
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constructor(audioContext: AudioContext, config: MotifConfig, model: SynthModel = 'nes_gb') {
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this.audioContext = audioContext;
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this.config = config;
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this.masterGain = audioContext.createGain();
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this.masterGain.connect(audioContext.destination);
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this.postGain = audioContext.createGain();
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this.postGain.connect(audioContext.destination);
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this.model = model;
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this.maxVoices = this.getMaxVoicesForModel(model, config.maxOscillators);
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// Default overall level
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this.masterGain.gain.value = 0.3;
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this.postGain.gain.value = 1.0;
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// Route + optional effects
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this.effectCleanup = this.configureMasterChain(model);
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}
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setupLayers(assignments: RoleAssignment[]): void {
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// Clean up existing layers
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this.cleanupLayers();
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// Reset voice budgeting per setup (important when switching models)
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this.activeVoiceCount = 0;
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// Apply model role filtering
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const filteredAssignments = this.filterAssignmentsForModel(assignments);
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// Find the earliest event time across all assignments
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let earliestTime = Infinity;
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for (const assignment of assignments) {
|
||||
for (const assignment of filteredAssignments) {
|
||||
if (assignment.events.length > 0) {
|
||||
earliestTime = Math.min(earliestTime, assignment.events[0].time);
|
||||
}
|
||||
@@ -37,7 +58,7 @@ export class SynthesisEngine {
|
||||
// If we found events, normalize times to start at 0
|
||||
if (earliestTime !== Infinity && earliestTime > 0) {
|
||||
console.log('Normalizing event times, earliest was:', earliestTime);
|
||||
for (const assignment of assignments) {
|
||||
for (const assignment of filteredAssignments) {
|
||||
// Normalize note events
|
||||
for (const event of assignment.events) {
|
||||
event.time -= earliestTime;
|
||||
@@ -50,7 +71,7 @@ export class SynthesisEngine {
|
||||
}
|
||||
|
||||
// Store role assignments and create layers
|
||||
for (const assignment of assignments) {
|
||||
for (const assignment of filteredAssignments) {
|
||||
const layer = this.createSynthLayer(assignment.role);
|
||||
this.layers.set(assignment.role, layer);
|
||||
this.roleAssignments.set(assignment.role, assignment);
|
||||
@@ -175,37 +196,62 @@ export class SynthesisEngine {
|
||||
}
|
||||
|
||||
private configureLayerForRole(gain: GainNode, filter: BiquadFilterNode, role: Role): void {
|
||||
// Default per-model filter shaping (keeps presets recognizable)
|
||||
if (this.model === 'pre8bit') {
|
||||
// Very bright, very simple
|
||||
filter.type = 'lowpass';
|
||||
filter.frequency.value = 6000;
|
||||
filter.Q.value = 0.8;
|
||||
} else if (this.model === 'snes_ish') {
|
||||
// Warmer, a little more body
|
||||
filter.type = 'lowpass';
|
||||
filter.frequency.value = 2400;
|
||||
filter.Q.value = 0.9;
|
||||
}
|
||||
|
||||
switch (role) {
|
||||
case 'bass':
|
||||
gain.gain.value = 0.4;
|
||||
filter.type = 'lowpass';
|
||||
filter.frequency.value = 200;
|
||||
gain.gain.value = this.model === 'pre8bit' ? 0.5 : 0.4;
|
||||
if (this.model !== 'pre8bit') {
|
||||
filter.type = 'lowpass';
|
||||
filter.frequency.value = this.model === 'snes_ish' ? 260 : 200;
|
||||
} else {
|
||||
filter.frequency.value = 350;
|
||||
}
|
||||
break;
|
||||
case 'drone':
|
||||
gain.gain.value = 0.2;
|
||||
filter.type = 'bandpass';
|
||||
filter.frequency.value = 400;
|
||||
gain.gain.value = this.model === 'pre8bit' ? 0.0 : 0.2;
|
||||
if (this.model !== 'pre8bit') {
|
||||
filter.type = 'bandpass';
|
||||
filter.frequency.value = this.model === 'snes_ish' ? 520 : 400;
|
||||
}
|
||||
break;
|
||||
case 'ostinato':
|
||||
gain.gain.value = 0.3;
|
||||
filter.type = 'highpass';
|
||||
filter.frequency.value = 300;
|
||||
gain.gain.value = this.model === 'pre8bit' ? 0.25 : 0.3;
|
||||
if (this.model !== 'pre8bit') {
|
||||
filter.type = 'highpass';
|
||||
filter.frequency.value = this.model === 'snes_ish' ? 220 : 300;
|
||||
}
|
||||
break;
|
||||
case 'texture':
|
||||
gain.gain.value = 0.1;
|
||||
filter.type = 'bandpass';
|
||||
filter.frequency.value = 800;
|
||||
gain.gain.value = this.model === 'pre8bit' ? 0.0 : 0.1;
|
||||
if (this.model !== 'pre8bit') {
|
||||
filter.type = 'bandpass';
|
||||
filter.frequency.value = this.model === 'snes_ish' ? 900 : 800;
|
||||
}
|
||||
break;
|
||||
case 'accents':
|
||||
gain.gain.value = 0.5;
|
||||
filter.type = 'peaking';
|
||||
filter.frequency.value = 1000;
|
||||
gain.gain.value = this.model === 'pre8bit' ? 0.35 : 0.5;
|
||||
if (this.model !== 'pre8bit') {
|
||||
filter.type = 'peaking';
|
||||
filter.frequency.value = this.model === 'snes_ish' ? 1200 : 1000;
|
||||
}
|
||||
break;
|
||||
case 'melody':
|
||||
// Passthrough mode - balanced sound for all notes
|
||||
gain.gain.value = 0.35;
|
||||
gain.gain.value = this.model === 'pre8bit' ? 0.4 : 0.35;
|
||||
filter.type = 'lowpass';
|
||||
filter.frequency.value = 4000; // Brighter sound for full range
|
||||
filter.frequency.value = this.model === 'snes_ish' ? 3200 : 4000; // Brighter for chip, warmer for SNES-ish
|
||||
break;
|
||||
}
|
||||
}
|
||||
@@ -217,6 +263,13 @@ export class SynthesisEngine {
|
||||
private scheduleNote(role: Role, pitch: number, duration: number, velocity: number, when: number): void {
|
||||
const layer = this.layers.get(role);
|
||||
if (!layer) return;
|
||||
|
||||
// Model gating: pre8bit runs intentionally sparse
|
||||
if (this.model === 'pre8bit') {
|
||||
if (role !== 'bass' && role !== 'melody') return;
|
||||
}
|
||||
|
||||
if (this.activeVoiceCount >= this.maxVoices) return;
|
||||
|
||||
const osc = this.audioContext.createOscillator();
|
||||
const envelope = this.audioContext.createGain();
|
||||
@@ -225,33 +278,50 @@ export class SynthesisEngine {
|
||||
const frequency = this.midiToFrequency(pitch);
|
||||
osc.frequency.value = frequency;
|
||||
|
||||
// Choose oscillator type based on role
|
||||
switch (role) {
|
||||
case 'bass':
|
||||
osc.type = 'square';
|
||||
break;
|
||||
case 'drone':
|
||||
osc.type = 'sawtooth';
|
||||
break;
|
||||
case 'ostinato':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'melody':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'texture':
|
||||
case 'accents':
|
||||
osc.type = 'sine';
|
||||
break;
|
||||
// Choose oscillator type based on model + role
|
||||
if (this.model === 'pre8bit') {
|
||||
osc.type = role === 'bass' ? 'triangle' : 'square';
|
||||
} else if (this.model === 'snes_ish') {
|
||||
// Warmer “sample-ish” feel: richer waveforms + filtering + echo on master
|
||||
if (role === 'bass') osc.type = 'triangle';
|
||||
else if (role === 'drone') osc.type = 'sawtooth';
|
||||
else if (role === 'ostinato') osc.type = 'triangle';
|
||||
else if (role === 'melody') osc.type = 'sawtooth';
|
||||
else osc.type = 'sine';
|
||||
|
||||
// Subtle detune (feels less “pure chip”)
|
||||
osc.detune.value = (Math.random() - 0.5) * 8; // ±4 cents
|
||||
} else {
|
||||
// nes_gb (current default)
|
||||
switch (role) {
|
||||
case 'bass':
|
||||
osc.type = 'square';
|
||||
break;
|
||||
case 'drone':
|
||||
osc.type = 'sawtooth';
|
||||
break;
|
||||
case 'ostinato':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'melody':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'texture':
|
||||
case 'accents':
|
||||
osc.type = 'sine';
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
osc.connect(envelope);
|
||||
envelope.connect(layer.filterNode);
|
||||
|
||||
// Envelope based on velocity and duration with minimum times to prevent clicks
|
||||
// Envelope tuned per model (still with minimum times to prevent clicks)
|
||||
const gainValue = velocity * 0.5; // Scale velocity
|
||||
const attackTime = Math.max(0.005, Math.min(0.05, duration * 0.1)); // Min 5ms attack
|
||||
const releaseTime = Math.max(0.01, Math.min(0.1, duration * 0.3)); // Min 10ms release
|
||||
const attackBase = this.model === 'pre8bit' ? 0.003 : this.model === 'snes_ish' ? 0.01 : 0.005;
|
||||
const releaseBase = this.model === 'pre8bit' ? 0.008 : this.model === 'snes_ish' ? 0.14 : 0.01;
|
||||
const attackTime = Math.max(attackBase, Math.min(0.06, duration * 0.1));
|
||||
const releaseTime = Math.max(releaseBase, Math.min(this.model === 'snes_ish' ? 0.22 : 0.12, duration * 0.3));
|
||||
|
||||
envelope.gain.setValueAtTime(0, when);
|
||||
envelope.gain.linearRampToValueAtTime(gainValue, when + attackTime);
|
||||
@@ -260,6 +330,8 @@ export class SynthesisEngine {
|
||||
|
||||
osc.start(when);
|
||||
osc.stop(when + duration + releaseTime + 0.01); // Stop after envelope completes
|
||||
|
||||
this.activeVoiceCount++;
|
||||
|
||||
// Clean up after note ends
|
||||
setTimeout(() => {
|
||||
@@ -269,6 +341,7 @@ export class SynthesisEngine {
|
||||
} catch (e) {
|
||||
// Already disconnected
|
||||
}
|
||||
this.activeVoiceCount = Math.max(0, this.activeVoiceCount - 1);
|
||||
}, (duration + releaseTime + 0.1) * 1000);
|
||||
}
|
||||
|
||||
@@ -290,6 +363,12 @@ export class SynthesisEngine {
|
||||
|
||||
if (!events.length && !chords.length) return;
|
||||
|
||||
// pre8bit is intentionally simple: no chord scheduling
|
||||
if (this.model === 'pre8bit') {
|
||||
this.scheduleSingleEvents(role, events, scheduleUntil);
|
||||
return;
|
||||
}
|
||||
|
||||
// For roles that support polyphony (drone, texture), prefer chords
|
||||
if ((role === 'drone' || role === 'texture') && chords.length > 0) {
|
||||
this.scheduleChordEvents(role, chords, scheduleUntil);
|
||||
@@ -392,9 +471,13 @@ export class SynthesisEngine {
|
||||
private scheduleChord(role: Role, pitches: number[], duration: number, velocity: number, when: number): void {
|
||||
const layer = this.layers.get(role);
|
||||
if (!layer) return;
|
||||
|
||||
if (this.activeVoiceCount >= this.maxVoices) return;
|
||||
|
||||
// Create oscillator for each pitch in the chord
|
||||
for (const pitch of pitches) {
|
||||
// Create oscillator for each pitch in the chord (unless constrained)
|
||||
const chordPitches = this.model === 'snes_ish' ? pitches.slice(0, 4) : pitches.slice(0, 3);
|
||||
for (const pitch of chordPitches) {
|
||||
if (this.activeVoiceCount >= this.maxVoices) break;
|
||||
const osc = this.audioContext.createOscillator();
|
||||
const envelope = this.audioContext.createGain();
|
||||
|
||||
@@ -402,35 +485,46 @@ export class SynthesisEngine {
|
||||
const frequency = this.midiToFrequency(pitch);
|
||||
osc.frequency.value = frequency;
|
||||
|
||||
// Choose oscillator type based on role
|
||||
switch (role) {
|
||||
case 'bass':
|
||||
osc.type = 'square';
|
||||
break;
|
||||
case 'drone':
|
||||
osc.type = 'sawtooth';
|
||||
break;
|
||||
case 'ostinato':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'texture':
|
||||
osc.type = 'sine';
|
||||
break;
|
||||
case 'melody':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'accents':
|
||||
osc.type = 'sine';
|
||||
break;
|
||||
// Choose oscillator type based on model + role (same as note path)
|
||||
if (this.model === 'snes_ish') {
|
||||
if (role === 'bass') osc.type = 'triangle';
|
||||
else if (role === 'drone') osc.type = 'sawtooth';
|
||||
else if (role === 'ostinato') osc.type = 'triangle';
|
||||
else if (role === 'melody') osc.type = 'sawtooth';
|
||||
else osc.type = 'sine';
|
||||
osc.detune.value = (Math.random() - 0.5) * 8;
|
||||
} else {
|
||||
switch (role) {
|
||||
case 'bass':
|
||||
osc.type = 'square';
|
||||
break;
|
||||
case 'drone':
|
||||
osc.type = 'sawtooth';
|
||||
break;
|
||||
case 'ostinato':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'texture':
|
||||
osc.type = 'sine';
|
||||
break;
|
||||
case 'melody':
|
||||
osc.type = 'triangle';
|
||||
break;
|
||||
case 'accents':
|
||||
osc.type = 'sine';
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
osc.connect(envelope);
|
||||
envelope.connect(layer.filterNode);
|
||||
|
||||
// Envelope based on velocity and duration, scaled for chords with minimum times to prevent clicks
|
||||
const gainValue = (velocity * 0.3) / Math.max(pitches.length * 0.5, 1); // Scale down for chords
|
||||
const attackTime = Math.max(0.005, Math.min(0.05, duration * 0.1)); // Min 5ms attack
|
||||
const releaseTime = Math.max(0.01, Math.min(0.1, duration * 0.3)); // Min 10ms release
|
||||
const gainValue = (velocity * 0.3) / Math.max(chordPitches.length * 0.5, 1); // Scale down for chords
|
||||
const attackBase = this.model === 'snes_ish' ? 0.01 : 0.005;
|
||||
const releaseBase = this.model === 'snes_ish' ? 0.16 : 0.01;
|
||||
const attackTime = Math.max(attackBase, Math.min(0.06, duration * 0.1));
|
||||
const releaseTime = Math.max(releaseBase, Math.min(this.model === 'snes_ish' ? 0.24 : 0.12, duration * 0.3));
|
||||
|
||||
envelope.gain.setValueAtTime(0, when);
|
||||
envelope.gain.linearRampToValueAtTime(gainValue, when + attackTime);
|
||||
@@ -440,6 +534,8 @@ export class SynthesisEngine {
|
||||
osc.start(when);
|
||||
osc.stop(when + duration + releaseTime + 0.01); // Stop after envelope completes
|
||||
|
||||
this.activeVoiceCount++;
|
||||
|
||||
// Clean up after note ends
|
||||
setTimeout(() => {
|
||||
try {
|
||||
@@ -448,6 +544,7 @@ export class SynthesisEngine {
|
||||
} catch (e) {
|
||||
// Already disconnected
|
||||
}
|
||||
this.activeVoiceCount = Math.max(0, this.activeVoiceCount - 1);
|
||||
}, (duration + releaseTime + 0.1) * 1000);
|
||||
}
|
||||
}
|
||||
@@ -467,4 +564,76 @@ export class SynthesisEngine {
|
||||
}
|
||||
this.layers.clear();
|
||||
}
|
||||
|
||||
private getMaxVoicesForModel(model: SynthModel, defaultMax: number): number {
|
||||
if (model === 'pre8bit') return Math.min(2, defaultMax);
|
||||
if (model === 'snes_ish') return Math.max(12, defaultMax);
|
||||
return defaultMax;
|
||||
}
|
||||
|
||||
private filterAssignmentsForModel(assignments: RoleAssignment[]): RoleAssignment[] {
|
||||
if (this.model === 'pre8bit') {
|
||||
// Keep it intentionally simple and sparse.
|
||||
const keep: Role[] = ['melody', 'bass'];
|
||||
const kept = assignments.filter(a => keep.includes(a.role));
|
||||
// If role mapper didn’t produce those roles, fall back to first available assignment.
|
||||
if (kept.length > 0) return kept.slice(0, 2);
|
||||
return assignments.slice(0, 1);
|
||||
}
|
||||
return assignments;
|
||||
}
|
||||
|
||||
private configureMasterChain(model: SynthModel): () => void {
|
||||
// Disconnect any previous chain
|
||||
try { this.masterGain.disconnect(); } catch {}
|
||||
if (this.effectCleanup) {
|
||||
try { this.effectCleanup(); } catch {}
|
||||
}
|
||||
|
||||
// Default: dry only
|
||||
if (model !== 'snes_ish') {
|
||||
this.masterGain.connect(this.postGain);
|
||||
return () => {
|
||||
try { this.masterGain.disconnect(); } catch {}
|
||||
};
|
||||
}
|
||||
|
||||
// SNES-ish: add a simple echo/reverb-like feedback delay with filtering.
|
||||
const dry = this.audioContext.createGain();
|
||||
const wet = this.audioContext.createGain();
|
||||
const delay = this.audioContext.createDelay(1.0);
|
||||
const feedback = this.audioContext.createGain();
|
||||
const fbFilter = this.audioContext.createBiquadFilter();
|
||||
|
||||
dry.gain.value = 0.85;
|
||||
wet.gain.value = 0.28;
|
||||
delay.delayTime.value = 0.165; // ~165ms echo
|
||||
feedback.gain.value = 0.32;
|
||||
fbFilter.type = 'lowpass';
|
||||
fbFilter.frequency.value = 1800;
|
||||
fbFilter.Q.value = 0.7;
|
||||
|
||||
// master -> dry -> post
|
||||
this.masterGain.connect(dry);
|
||||
dry.connect(this.postGain);
|
||||
|
||||
// master -> delay -> wet -> post
|
||||
this.masterGain.connect(delay);
|
||||
delay.connect(wet);
|
||||
wet.connect(this.postGain);
|
||||
|
||||
// feedback loop: delay -> filter -> feedback -> delay
|
||||
delay.connect(fbFilter);
|
||||
fbFilter.connect(feedback);
|
||||
feedback.connect(delay);
|
||||
|
||||
return () => {
|
||||
try { this.masterGain.disconnect(); } catch {}
|
||||
try { dry.disconnect(); } catch {}
|
||||
try { wet.disconnect(); } catch {}
|
||||
try { delay.disconnect(); } catch {}
|
||||
try { feedback.disconnect(); } catch {}
|
||||
try { fbFilter.disconnect(); } catch {}
|
||||
};
|
||||
}
|
||||
}
|
||||
@@ -38,6 +38,9 @@ export interface StructuralFeatures {
|
||||
|
||||
export type Role = 'bass' | 'drone' | 'ostinato' | 'texture' | 'accents' | 'melody';
|
||||
|
||||
// Procedural synth model presets (test page uses these)
|
||||
export type SynthModel = 'pre8bit' | 'nes_gb' | 'snes_ish';
|
||||
|
||||
export interface RoleAssignment {
|
||||
role: Role;
|
||||
sourceTrack: number;
|
||||
|
||||
Reference in New Issue
Block a user