PsychPortAudio(‘UseSchedule’, pahandle, enableSchedule [, maxSize = 128]);
Enable or disable use of a preprogrammed schedule for audio playback on audio
Schedules are similar to playlists on your favorite audio player. A schedule
allows to define a sequence of distinct sounds to play in succession. When
PsychPortAudio(‘Start’) is called, processing of the schedule begins and the
first programmed sound snippet is played, followed by the 2nd, 3rd, … until
the whole schedule has been played once and playback stops. You can add new
sound snippets to the schedule while playback is running for uninterrupted
playback of long sequences of sound.
Each sound snippet or slot in the schedule defines a soundbuffer to play back
via a ‘bufferhandle’, within the buffer a subsegment (a so called playloop)
defined by start- and endpoint, and a number of repetitions for that playloop.
This subfunction allows to either enable use of schedules by setting the
‘enableSchedule’ flag to 1, in which case a schedule with a maximum of ‘maxSize’
distinct slots is created (‘maxSize’ defaults to 128 slots), or to disable use
of schedules by setting ‘enableSchedule’ to 0, in which case PsychPortAudio
reverts back to its normal playback behaviour and an existing schedule is
A ‘enableSchedule’ setting of 2 will reset an existing schedule, ie. clear it of
all its entries, so it is ready to be rewritten with new entries. You should
reset and rewrite a schedule each time after playback/processing of a schedule
has finished or has been stopped.
A ‘enableSchedule’ setting of 3 will reactivate an existing schedule, ie.
prepare it for a replay.
See the subfunction ‘AddToSchedule’ on how to populate the schedule with actual
###See also: FillBuffer Start Stop RescheduleStart AddToSchedule