Function Calls

The following Audio folio calls use instruments, play attachments, and control audio timing.

Using Instruments

The following calls are used to start, stop, and release an instrument:

ReleaseInstrument() Allows an instrument to finish (Note Off).
StartInstrument() Begins playing an instrument (Note On).
StopInstrument() Abruptly stops an instrument.

Playing Attachments

The following calls are used to start, stop, and release an attachment:

StartAttachment() Starts an attachment.
StopAttachment() Stops an attachment.
ReleaseAttachment() Releases an attachment.

Timing Audio Events

The following calls handle timing audio events:

GetAudioTime() Queries current time.
GetCueSignal() Returns a signal mask for a cue.
MonitorAttachment() Monitors an attachment, sends a cue at a specified point.
SignalAtTime() Requests a wake-up call at a given time.
SleepAudioTicks() Enters wait state for a number of audio ticks.
SleepUntilTime() Enters wait state until a specified audio time.
WhereAttachment() Returns the byte offset of the sample currently playing.

Audio Clock Control

The following calls control the audio clock:

DisownAudioClock() Gives up ownership of the audio clock.
GetAudioDuration() Asks for the current duration of an audio clock tick.
GetAudioRate() Asks for current audio clock rate.
OwnAudioClock() Takes ownership of clock.
SetAudioDuration() Changes duration of audio clock tick.
SetAudioRate() Changes the rate of the audio clock.