audio.5 (2010 09)

Audio(5) Audio(5)

OBSOLETED OBSOLETED

$HOME/.vueprofile

ﬁle. The SPEAKER variable can be external (headphones, Line Out) or internal

(built-in speaker).

To set the

SPEAKER variable for a POSIX or Korn shell, enter:

SPEAKER=internal

export speaker

To set the SPEAKER variable for a C shell, enter:

setenv SPEAKER internal

Audio File and Data Formats

Audio ﬁles supported contain uncompressed audio data in one of three ﬁle formats: generic,

RIFF/Waveform, or raw. Each ﬁle also needs the correct ﬁlename extension. For the three ﬁle formats,

the Audio Editor online help lists which data formats and ﬁlename extensions that apply.

The extension causes the appropriate icon to appear in the File Manager. To play audio ﬁles you can

drag and drop the ﬁle icons onto the Audio Editor or Control Panel or double-click the icon.

If you need to add an extension to a ﬁlename, (or convert the ﬁle format) the

/opt/audio/bin/convert

command is recommended. See convert (1). However, you can instead

rename the ﬁle to make it playable. Use this ﬁlename format:

ﬁlename

.rate .data_type

The rate and data_type variables accept values deﬁned for the

-drate and -ddata options of

con-

vert. If needed, you can omit the rate variable. Use this ﬁlename format:

ﬁlename

.data_type

Audio Library

HP-UX includes an Audio Library that was used to build the audio tools. If you have ordered and

installed the User Environment Developer’s Kit , you can use the Audio Library to create other audio

applications.

The HP-UX Audio Library contains functions that C programs can use to manipulate audio. The func-

tions interact with the Audio Server, enabling the application to record and play audio data ﬁles and con-

vert audio data ﬁles from one format to another.

For more information about audio programming, refer to the manual Using the Audio Developer’s Kit .

AUTHOR

The Audio Library, Audio Editor, and Audio Control Panel were developed by HP.