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clarify sustain and duration

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~d6 2023-09-13 01:23:23 -04:00
parent 8046ed022f
commit feac155257
1 changed files with 3 additions and 1 deletions
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audio-v2.md
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@ -62,6 +62,8 @@ specified in 10ms increments (e.g. `0x03` is 30ms). The S port for
So with a value of `0xff` the note would hold as long as possible, and
with `0x00` the release would occur just after the decay ends.
(If the duration is short parts of the envelope may be truncated.)
Since each component has its own port, it's also much easier to adjust
one without having to fiddle with bit masks, shifting, etc.
@ -73,7 +75,7 @@ one without having to fiddle with bit masks, shifting, etc.
0x32 2 bytes duration duration to play sound in fractional seconds (1ms resolution)
0x34 1 byte attack envelope: attack duration (vol 0-100%, 10ms resolution)
0x35 1 byte decay envelope: decay duration (vol 100-50%, 10ms resolution)
0x36 1 byte sustain envelope: sustain duration (vol 50%, 10ms resolution)
0x36 1 byte sustain envelope: sustain fraction (vol 50%, x/255 of free time)
0x37 1 byte release envelope: release duration (vol 50-0%, 10ms resolution)
0x38 2 bytes addr address to read waveform data from
0x3a 2 bytes length length of waveform data to read (in bytes)