HP 745i/100, Руководство пользователя

Страница: 68 / 214

FINAL TRIM SIZE : 7.0 in x 8.5 in
4
Using Audio Input/Output
HP-UX includes audio softw are comprising an audio editor, Audio Application
Program In terface (AAPI), and some sample programs. Audio output is
a v ailable either through an in ternal sp eak er in y our Series 700i/50 or 700i/100
SPU mo dule, or via an audio output jac k on the SPU mo dule panel. F or
highest quality audio, an external headphone set or sp eak er is recommended.
(See \Setting Audio V olume" in Chapter 3 for setting v olume for sp ecic
output requiremen ts).
Dev eloping Audio Applications
The HP-UX audio softw are pac k age con tains clien t and serv er comp onen ts,
whic h can run on separate systems. Audio data may reside on still a third
system.
The Audio Applications Programming In terface (AAPI) includes a library of
functions that can b e called b y an application program written in C language.
The functions in teract with the audio serv er, enabling the application to record
and play audio data les and also con v ert audio data les from one format to
another.
The AAPI also includes audio widgets for play and record, and a to olkit of
functions that initialize, register, and unregister these widgets. The to olkit and
widgets enable application programs based on Motif or similar graphical user
in terface to olkits to in tegrate audio capabilities.
Using the Audio Demonstration Program
The audio demonstration program is designed to demonstrate man y of the
capabilities of the AAPI. It pro vides a Motif-like in terface to play , record, and
edit functionalit y . A w a v eform is display ed to facilitate editing and trav ersal of
the audio selection.
4-16 Using the Command Line DRAFT
2/5/97 11:31