Instrument events

"Triggering" an instrument means triggering the channel's three envelopes and applying the PITCH_FACTOR and MOD_FACTOR to its dynamics. Releasing an instrument releases its three envelopes.

I/O definitions

CLASS IO_INSTRUMENT # SIZE 222
  INSET ENVELOPES: IO_ENVELOPE[INSET 3]

  INSET WAVE_A: IO_WAVE_WITH_DIGITAR
  INSET WAVE_B: IO_WAVE_WITH_DIGITAR
  INSET WAVE_C: IO_WAVE

  INSET CHANNEL_EFFECT: IO_CHANNEL_EFFECT

  # UNITS: S6.10 FIXED POINT
  INSET LEFT_LEVEL: IO_DYNAMIC

  # UNITS: S6.10 FIXED POINT
  INSET RIGHT_LEVEL: IO_DYNAMIC

  # UNITS: S6.10 FIXED POINT
  INSET REVERB_LEVEL: IO_DYNAMIC  # [JAMDAC PLUS]

  # 1=STEREO LEFT CHANNEL IS DELAYED
  VAR APPLY_WIDENER: BYTE
END CLASS

CLASS IO_AUDIO_EVENT # SIZE 5
  #   0  = LOAD INSTRUMENT              OPERAND = ADDRESS OF IO_INSTRUMENT
  #                                               OR NULL TO RESET
  #   1  = TRIGGER INSTRUMENT           OPERAND = MOD_FACTOR IN HIGH PAIR;
  #                                               PITCH_FACTOR IN LOW PAIR
  #                                               (VALUES ARE S6.10 FIXED POINT)
  # * 2  = RELEASE INSTRUMENT
  . . .
  VAR KIND: BYTE

  VAR OPERAND: INT
END CLASS