code/__DEFINES/instrument_defines.dm

CHANNELS_PER_INSTRUMENT	Max number of playing notes per instrument.
INSTRUMENT_MAX_TOTAL_SUSTAIN	Maximum length a note should ever go for
INSTRUMENT_EXP_FALLOFF_MIN	These are per decisecond.
INSTRUMENT_MIN_SUSTAIN_DROPOFF	Minimum volume for when the sound is considered dead.

Define Details

Max number of playing notes per instrument.

These are per decisecond.

Maximum length a note should ever go for

Minimum volume for when the sound is considered dead.