Datapixx(‘GetAudioStatus’)

Psychtoolbox>Datapixx.{mex*} subfunction

Returns a struct containing the following audio status information:
-“scheduleRunning” is 1 if audio waveform playback schedule is currently
running, or 0 if stopped.
-“scheduleOnset” is the programmed delay in seconds between StartAudioSchedule
execution, and the first audio update.
-“scheduleRate” is the audio sample rate in samples per second.
-“lrMode” is the left/right ear update mode (see SetAudioSchedule for details).
-“volumeAudioOutLeft” is the volume of the left channel routed to the Audio Out
jack.
-“volumeAudioOutRight” is the volume of the right channel routed to the Audio
Out jack.
-“volumeSpeakerLeft” is the volume of the left channel routed to the internal
speaker.
-“volumeSpeakerRight” is the volume of the right channel routed to the internal
speaker.
-“bufferBaseAddress” is the waveform data buffer base address within the
Datapixx.
-“bufferSize” is the number of bytes in the waveform data buffer.
-“numBufferFrames” is the total number of audio samples which fit in the
waveform data buffer specified in SetAudioSchedule.
-“currentWriteFrame” is the buffer frame which will be written by the next
streaming call to WriteAudioBuffer.
-“currentReadFrame” is the current buffer frame being read by the audio
transmitter
-“freeBufferFrames” = numBufferFrames - (currentWriteFrame - currentReadFrame).
This is the maximum number of frames which can be written by the next call to
WriteAudioBuffer in streaming mode, without causing a streaming overflow.
-“maxScheduleFrames”, if non-0, is the value of currentReadFrame which will
automatically stop the schedule.
-“numStreamUnderflows” is the number of WriteAudioBuffer streaming underflows
which have occurred since SetAudioSchedule. See WriteAudioBuffer for details.
-“numStreamOverflows” is the number of WriteAudioBuffer streaming overflows
which have occurred since SetAudioSchedule. See WriteAudioBuffer for details.
See DatapixxSimonGame, DatapixxAudio*Demo files for examples.

###See also: InitAudio, SetAudioSchedule, StartAudioSchedule, StopAudioSchedule, WriteAudioBuffer