Datapixx(‘GetMicrophoneStatus’)

Psychtoolbox>Datapixx.{mex*} subfunction

Returns a struct containing the following audio input status information:
-“source” is the audio input source:
0: Has not been set yet via SetMicrophoneSource
1: High impedance “MIC IN” jack
2: Line level “Audio IN” jack
-“gain” is the input audio amplification set by SetMicrophoneSource
-“audioLoopback” is 1 if audio inputs are driven internally by audio outputs, or
0 if audio inputs decode sound from external input jacks.
-“scheduleRunning” is 1 if the audio acquisition schedule is currently running,
or 0 if stopped.
-“scheduleOnset” is the programmed delay in seconds between
StartMicrophoneSchedule execution, and the first audio sample acquisition.
-“scheduleRate” is the audio sample rate in samples per second.
-“lrMode” is the left/right ear acquisition mode (see SetMicrophoneSchedule for
details).
-“bufferBaseAddress” is the acquisition data buffer base address within the
Datapixx.
-“bufferSize” is the number of bytes in the acquisition data buffer.
-“numBufferFrames” is the total number of samples which fit in the acquisition
data buffer.
-“currentWriteFrame” is the buffer frame which will be written by the next
acquired audio sample.
-“currentReadFrame” is the buffer frame which will be read by the next streaming
call to ReadMicrophoneBuffer.
-“newBufferFrames” = currentWriteFrame - currentReadFrame. This is the maximum
number of frames which can be read by the next call to ReadMicrophoneBuffer in
streaming mode, without causing a streaming underflow.
-“maxScheduleFrames”, if non-0, is the value of currentWriteFrame which will
automatically stop the schedule.
-“numStreamUnderflows” is the number of ReadMicrophoneBuffer streaming
underflows which have occurred since SetMicrophoneSchedule. See
ReadMicrophoneBuffer for details.
-“numStreamOverflows” is the number of ReadMicrophoneBuffer streaming overflows
which have occurred since SetMicrophoneSchedule. See ReadMicrophoneBuffer for
details.
See DatapixxMicrophone*Demo and DatapixxAudioFeedbackDemo files for examples.

###See also: InitAudio, SetMicrophoneSchedule, StartMicrophoneSchedule, StopMicrophoneSchedule, ReadMicrophoneBuffer