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fix: ARM nhiều track phát sai instrument - synth_engine của track là nguồn quyết định thay vì channel state (bỏ che mask khi channel giữ instrument cũ/trùng)

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3dtours
2026-08-03 10:33:40 +07:00
parent d8227904b6
commit 0dc95386f2
3 changed files with 12 additions and 10 deletions
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app/static/js/services/soundfontPlayer.js
+6 -9
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@@ -424,18 +424,15 @@
var finalProg = usedProg;
var finalSfId = synthEngine ? synthEngine.soundfont_id : undefined;
var cachedCh = _channels[ch];
// A channel explicitly configured with a soundfont (via
// selectInstrument) is authoritative. But the default channel
// state (bank 0, program 0, no soundfont) must NOT mask the
// track's synth engine or the note's program — otherwise notes
// on a freshly-picked instrument are silently dropped.
if (cachedCh && cachedCh.sfId !== undefined) {
// The note's own synth engine (track instrument) is
// authoritative. Channel state is only a cache: it must never
// mask the track's instrument, otherwise multi-track ARM or a
// re-picked instrument plays the wrong soundfont. Without an
// engine, fall back to the soundfont configured on the channel.
if (!synthEngine && cachedCh && cachedCh.sfId !== undefined) {
finalBank = cachedCh.bank;
finalProg = cachedCh.program;
finalSfId = cachedCh.sfId;
} else if (!synthEngine && program !== undefined && cachedCh && cachedCh.program !== undefined && cachedCh.program !== 0 && cachedCh.program !== null) {
finalBank = cachedCh.bank;
finalProg = cachedCh.program;
}
// Ensure the soundfont is actually loaded before the note plays.
// Quick instrument pick on a track does not pre-load it, so load