About the audio subsystem
The audio subsystem consists of:
Audio device drivers
Modern audio adapters (and sound controllers integrated on the
motherboard) often comprise a set of independent devices.
UnixWare 7 audio drivers support these devices:
the basic device for digital/analog conversion. This allows
digital sound files to be converted to analog signals for
playback, and analog signals from a recording device to be
synthesizers, used for playing music
Only FM synthesizers are currently supported.
MIDI (Musical Instrument Digital Interface)
interfaces, used to connect external electronic musical
instruments to a computer
Each of these devices requires its own I/O address and other
configuration parameters. See also
``Audio device entries in the Resource Manager database''.
Play and record utilities
Computer audio subsystems must include software to control input
and output sound characteristics such as volume levels, stereo
separation, and sound sources. Sound-enabled applications often
include such capabilities, which can communicate directly with the
UnixWare 7 includes the
utility for playing and recording sounds.
UnixWare 7 also includes these command-line utilities:
sets volume levels, and selects input and output devices
plays sound files
records sound files
An audio driver must be installed before these utilities can be
Volume levels must be set manually with mixer before
using scosound, or a command line must be available to
run mixer in addition to running scosound.
UnixWare 7 audio adapters drivers are based on Open Sound System
(OSS), a sound driver architecture for UNIX systems developed
by 4Front Technologies.
Because the audio subsystem conforms to the OSS
API (Application Programming Interface), you can run
OSS-compliant audio-enabled applications.
For more information and examples of
audio-enabled applications, see their web site:
Skunkware® includes audio-enabled applications, as
well as many other useful utilities. For more information, see
the Skunkware web site:
However, the 4Front sound drivers included in Skunkware are not
supported on UnixWare 7 systems; see
``Compatibility with earlier audio drivers''.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004