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scosound(X1)


scosound -- graphical audio control utility

Synopsis

/usr/X/bin/scosound [-option...] [audio_file]

Description

scosound is an audio playback and record utility. It can be used as an X-based graphical utility or from the command line.

Entered without options or with only an audio file name, scosound starts in graphical mode. It provides a window consisting of the following three areas:


Menu bar
File and Options menus that give access to all scosound features:

Recording preferences area
Displays the current set of recording preferences set under the Options menu.

Control buttons
Buttons that control playback and recording of audio files: Stop, Pause, Play, Record.


NOTE: A ``recording overrun'' can result if the sound source generates data faster than the computer can process it. This generally happens when the sample rate and/or sample size are set too high. If this happens, you might experience audio driver buffer overflows and missing audio sections in the recorded file. These error conditions are not usually detected by the audio driver, although you might see console error messages. Consult your sound card documentation for more information about your hardware's limits.

Options

The following options are also available when starting scosound from the command line:

-audiodevice | -audio | -device device
audio device; for example, /dev/dsp0 or /dev/audio

-fileformat | -file fileformat
file format; the default is wav. Available values are:

-dataformat | -data dataformat
sample size and encoding method; the default is pcm8. Available values are:

pcm8
common unsigned 8-bit linear (Pulse Modulation Control)

u8
unsigned 8-bit linear

s8
signed 8-bit linear

pcm16
common signed little endian 16-bit linear (Pulse Modulation Control)

s16b
signed big endian 16-bit linear

s16l
signed little endian 16-bit linear

u16b
unsigned big endian 16-bit linear

u16l
unsigned little endian 16-bit linear

mulaw | ulaw
common GREEK SMALL LETTER MU-law (mu-law) 8-bit logarithmic

alaw
A-law 8-bit logarithmic

ima_adpcm
IMA Adaptive Delta Pulse Control Modulation

mpeg
MPEG (Motion Picture Experts Group) standard

-comment string
comment; the default is "". This can be any string to be embedded in the file's comment field, if supported by the file format.

-samplerate | -rate rate
frequency with which the input stream is sampled (in Hz); default is 22050. Available values are:

8000
a telephony standard often used with ulaw and alaw encoding

11025
25% of the CD sampling rate or 50% of the Macintosh rate

16000
used by compression standards such as G.722

22050
the Macintosh sampling rate or 50% of the CD rate

32000
used in several digital broadcast standards

44100
the CD sampling rate

48000
the DAT (Digital Audio Tape) sampling rate

au file formats usually take sample rates of 8000Hz; wav file formats usually take 11025, 22050, or 44100Hz.


-gain percent
input gain in percent (an integer value from 0 to 100); the default is 75

-volume percent
output volume in percent (an integer value from 0 to 100); the default is 75

-channels channels
number of channels, where 1 is mono and 2 is stereo; the default is 1

-mono
same as -channels 2

-stereo
same as -channels 1

-autoplay
automatically initiate playing the file

Files

/usr/X/lib/X11/app-defaults/ScoSound

References

mixer(1), vplay(1), vrec(1)

``Configuring audio adapters'' in the UnixWare 7 System Handbook


© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004