ation();
E.comp = new Tone.Compressor(-16, 3);
E.limiter = new Tone.Limiter(-1).connect(E.master);
E.comp.connect(E.limiter);
E.verb = new Tone.Reverb({ decay: 2.4, wet: 1 }); E.verbSend = new Tone.Gain(0.22); E.verbSend.connect(E.verb); E.verb.connect(E.comp);
['drums', 'bass', 'chords', 'lead'].forEach(function (t) {
var c = new Tone.Channel({ volume: S.vols[t], mute: !!S.mutes[t] }).connect(E.comp);
if (t === 'chords' || t === 'lead') c.connect(E.verbSend);
E.ch[t] = c;
});
E.voxBus = new Tone.Channel({ volume: Number($('#ss-vvol').value) || 0 }).connect(E.comp);
E.recorder = (typeof MediaRecorder !== 'undefined') ? new Tone.Recorder() : null;
if (E.recorder) E.master.connect(E.recorder);
setSound('drums', S.sounds.drums); setSound('bass', S.sounds.bass); setSound('chords', S.sounds.chords); setSound('lead', S.sounds.lead);
T.bpm.value = S.bpm; T.swing = S.swing; T.swingSubdivision = '16n';
var idx = []; for (var i = 0; i < STEPS; i++) idx.push(i);
E.seq = new Tone.Sequence(function (time, step) {
var P = S.patterns;
if (step === 0 && E.started) E.bar++;
E.started = true;
['kick', 'snare', 'hat'].forEach(function (r) { if (P.drums[r][step]) E.inst.drums.play(r, time, r === 'hat' ? (step % 4 === 0 ? 0.8 : 0.5) : 0.95); });
var b = P.bass[step]; if (b) E.inst.bass.triggerAttackRelease(b, '8n', time, 0.9);
var c = P.chords[step]; if (c) { var notes = chordNotes(c); if (notes) { var len = 1; for (var k = step + 1; k < STEPS && !P.chords[k]; k++) len++; E.inst.chords.triggerAttackRelease(notes, Tone.Time('16n').toSeconds() * Math.min(len, 8), time, 0.6); } }
var l = P.lead[step]; if (l) E.inst.lead.triggerAttackRelease(l, '16n', time, 0.7);
var bar = E.bar;
Tone.getDraw().schedule(function () { drawPlayhead(step, bar); }, time);
}, idx, '16n');
E.seq.start(0);
return E;
}
function setSound(track, kind) {
S.sounds[track] = kind; save();
if (!E) return;
if (E.inst[track]) { try { E.inst[track].releaseAll && E.inst[track].releaseAll(); } catch (e) {} try { E.inst[track].dispose(); } catch (e) {} }
E.inst[track] = track === 'drums' ? makeDrums(kind, E.ch.drums) : makeSynth(track, kind, E.ch[track]);
}
var playing = false;
function checkUnlock() {
var need = !window.Tone || Tone.getContext().state !== 'running';
$('#ss-unlock').hidden = !need;
}
function unlock() {
if (!window.Tone) return Promise.reject(new Error('no Tone'));
return Tone.start().then(function () { buildEngine(); checkUnlock(); });
}
$('#ss-unlock-btn').addEventListener('click', function () { unlock().then(function () { toast('Sound is on.'); }, function () { toast('Could not start audio.'); }); });
function start() {
return unlock().then(function () {
var T = E.T; T.stop(); T.position = 0; E.bar = 0; E.started = false;
scheduleVox();
T.start('+0.08'); playing = true; setPlayButtons();
});
}
function stop() {
if (!E) return; E.T.stop(); playing = false; setPlayButtons(); drawPlayhead(-1, 0);
}
function setPlayButtons() {
$('#ss-play').textContent = playing ? '■ Stop' : '▶ Play';
$('#ss-vplay').textContent = playing ? '■ Stop' : '▶ Play with beat';
}
$('#ss-play').addEventListener('click', function () { if (playing) stop(); else start().catch(function () { toast('Tap again to start audio.'); }); });
$('#ss-vplay').addEventListener('click', function () {
if (playing) return stop();
if (!S.voxClips || !S.voxClips.length) toast('No vocals rendered yet — playing the beat.');
start().catch(function () { toast('Tap again to start audio.'); });
});
var lastCol = -1;
function drawPlayhead(step, bar) {
if (lastCol >= 0) $$('.ss-step[data-i="' + lastCol + '"]').forEach(function (c) { c.classList.remove('now'); });
lastCol = step;
if (step >= 0) { $$('.ss-step[data-i="' + step + '"]').forEach(function (c) { c.classList.add('now'); }); $('#ss-pos').textContent = 'bar ' + (bar + 1); }
else $('#ss-pos').textContent = 'bar 1';
}
// ---------------------------------------------------------------- STUDIO UI
var keySel = $('#ss-key'); keySel.innerHTML = KEYS.map(function (k) { return ''; }).join('');
function penOptions(track) {
if (track === 'bass') return scaleNotes(S.key, [1, 2]).concat([]);
if (track === 'lead') return scaleNotes(S.key, [4, 5]);
var ch = (S.chords || []).slice(); diatonicChords(S.key).forEach(function (c) { if (ch.indexOf(c) < 0) ch.push(c); }); return ch;
}
var TRACKS = [['drums', 'Drums'], ['bass', 'Bass'], ['chords', 'Chords'], ['lead', 'Lead']];
function stepBtn(i, on, label) { return ''; }
function renderTracks() {