passthru(1)							   passthru(1)

NAME    [Toc]    [Back]

     passthru -	pass audio sample data from an input port to an	output port

SYNOPSIS    [Toc]    [Back]

     passthru [-h][-v][-n nchannels][-s	samplefmt][-r rate]
	  [-b blksize][-q qsize][-e]

DESCRIPTION    [Toc]    [Back]

     Passthru opens an audio input port	and an output port, and	connects them.
     Command line options allow	the user to experiment with the	various	audio
     port parameters.

     -h	  help:	print out a list of command line options and their
	  descriptions

     -v	  verbose: output to stdout

     -n	  number of channels: 1	= mono,	2 = stereo

     -s	  sample format: 8, 16,	or 24 bit

     -r	  sample rate: 48000, 44100, 32000, etc

     -b	  transfer blocksize: specify value in sample FRAMES

     -q	  queuesize for	each of	the two	audio ports: specify value in SAMPLES

     -e	  error	reporting: display error status	of audio ports

     Larger transfer blocksizes	decrease the CPU load but they also cause
     larger latency from input and output.

FILES    [Toc]    [Back]

     Source code for passthru is installed here:
     /usr/share/src/dmedia/audio/passthru.c

SEE ALSO    [Toc]    [Back]

     apanel


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