Psychtoolbox>PsychPortAudio.{mex*} subfunction

Create a new dynamic audio data playback buffer for a PortAudio audio device and
fill it with initial data.
Return a ‘bufferhandle’ to the new buffer. ‘pahandle’ is the optional handle of
the device whose buffer is to be filled. ‘bufferdata’ is a matrix with audio
data in double() or single() format. Each row of the matrix specifies one sound
channel, each column one sample for each channel. Only floating point values are
supported. Samples need to be in range -1.0 to +1.0, with 0.0 for silence. This
is intentionally a very restricted interface. For lowest latency and best timing
we want you to provide audio data exactly at the optimal format and sample rate,
so the driver can safe computation time and latency for expensive sample rate
conversion, sample format conversion, and bounds checking/clipping.

You can refill the buffer anytime via the PsychPortAudio(‘RefillBuffer’) call.
You can delete the buffer via the PsychPortAudio(‘DeleteBuffer’) call, once it
is not used anymore.
You can attach the buffer to an audio playback schedule for actual audio
playback via the PsychPortAudio(‘AddToSchedule’) call.
The same buffer can be attached to and used by multiple audio devices
simultaneously, or multiple times within one or more playback schedules.

###See also: Open FillBuffer GetStatus