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
stored digitally.
-
synthesizers, used for playing music
NOTE:
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
audio driver.
UnixWare 7 includes the
scosound(X1)
utility for playing and recording sounds.
UnixWare 7 also includes these command-line utilities:
mixer(1)-
sets volume levels, and selects input and output devices
vplay(1)-
plays sound files
vrec(1)-
records sound files
An audio driver must be installed before these utilities can be
used.
NOTE:
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:
http://www.4front-tech.com/.
NOTE:
Skunkware® includes audio-enabled applications, as
well as many other useful utilities. For more information, see
the Skunkware web site:
http://www.sco.com/skunkware/.
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