Technical data

audioamd(7D) Devices SunOS 5.5
Audio Ports The record.avail_ports and play.avail_ports fields of the audio_info structure report the
available input and output ports. The audioamd device supports one input port, selected
by setting the record.port field to AUDIO_MICROPHONE. The play.port field may be set to
eitherAUDIO_SPEAKER or AUDIO_HEADPHONE, to direct audio output to the built-in
speaker or headphone jack, respectively. Note that AUDIO_SPEAKER cannot be enabled
for systems that do not include a built-in speaker.
Sample Granularity Since the audioamd device manipulates single samples of audio data, the reported input
and output sample counts will be very close to the actual sample count. However, some
other audio devices report sample counts that are approximate, due to buffering con-
straints. Programs should, in general, not rely on absolute accuracy of the sample count
fields.
FILES /dev/audio
/dev/audioctl
/dev/sound
/usr/demo/SOUND
SEE ALSO ioctl(2), audio(7I), streamio(7I)
AMD data sheet for the AM79C30A Digital Subscriber Controller, Publication number
09893.
7D-34 modified 18 Feb 1993