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Taud tracker: explicit nop and key-off behaviour

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minjaesong
2026-04-17 16:42:17 +09:00
parent 8702104bfe
commit 7f0ff3e653
2 changed files with 23 additions and 12 deletions
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8
terranmon.txt
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@@ -2012,10 +2012,16 @@ Instrument bin: Registry for 256 instruments, formatted as:
Play Data: play data are series of tracker-like instructions, visualised as: Play Data: play data are series of tracker-like instructions, visualised as:
rr||NOTE|Ins|E.Vol|E.Pan|EE.ff| rr||NOTE|Ins|E.Vol|E.Pan|EE.ff|
63||FFFF|255|3+ 64|3+ 64|16 FF| (8 bytes per line, 512 bytes per pattern, 256 patterns on 128 kB block) 63||FFFF|255|3 63|3 63|FF FFFF| (8 bytes per line, 512 bytes per pattern, 256 patterns on 128 kB block)
notes are tuned as 4096 Tone-Equal Temperament. Tuning is set per-sample using their Sampling rate value. notes are tuned as 4096 Tone-Equal Temperament. Tuning is set per-sample using their Sampling rate value.
Special values:
note 0xFFFF: no-op
note 0xFFFE: note cut
note 0x0000: key-off
Sound Adapter MMIO Sound Adapter MMIO

27
tsvm_core/src/net/torvald/tsvm/peripheral/AudioAdapter.kt
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@@ -1156,17 +1156,22 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
0xEC -> voice.cutAtTick = row.effectArg and 0xFF 0xEC -> voice.cutAtTick = row.effectArg and 0xFF
} }
if (row.note != 0xFFFF) { when (row.note) {
val inst = instruments[row.instrment] 0xFFFF -> {} // no-op: continue current note unchanged
voice.instrumentId = row.instrment 0x0000 -> voice.active = false // key-off (TODO: trigger envelope release phase)
voice.samplePos = inst.samplePlayStart.toDouble() 0xFFFE -> voice.active = false // note cut: immediate silence
voice.forward = true else -> {
voice.active = true val inst = instruments[row.instrment]
voice.envIndex = 0 voice.instrumentId = row.instrment
voice.envTimeSec = 0.0 voice.samplePos = inst.samplePlayStart.toDouble()
voice.envVolume = inst.envelopes[0].volume / 255.0 voice.forward = true
voice.noteVal = row.note voice.active = true
voice.playbackRate = computePlaybackRate(inst, row.note) voice.envIndex = 0
voice.envTimeSec = 0.0
voice.envVolume = inst.envelopes[0].volume / 255.0
voice.noteVal = row.note
voice.playbackRate = computePlaybackRate(inst, row.note)
}
} }
} }
} }