HP Model 744 HP Model 744 Owner's Guide - Page 40

Audio, Using the Audio Devel, oper's Kit

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Model 744 Board Computer Overview Audio Audio HP-UX includes audio software comprising an audio editor, Audio Application Program Interface (AAPI), and some sample programs. Audio output is available through the audio port on the front panel of the Model 744. For highest quality audio, an external headphone set or speaker is recommended. Audio is implemented using a CODEC (coder-decoder) combining CDquality stereo audio-digital converters for microphone and line-input levels. The input sampling rate and format are programmable, as are the input gain and output attenuation. A 1/8-inch mini-jack is used for the speaker output connection. The remaining audio signals are via a 9-pin D-sub connector. Output impedance is nominally 8 ohms, but higher impedance devices can also be driven. For information on programming for audio, refer to Using the Audio Developer's Kit (B2355-90069) and the man page audio. 1-18

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1-18
Model 744 Board Computer Overview
Audio
Audio
HP-UX includes audio software comprising an audio editor, Audio Applica-
tion Program Interface (AAPI), and some sample programs. Audio output is
available through the audio port on the front panel of the Model 744. For
highest quality audio, an external headphone set or speaker is recommended.
Audio is implemented using a CODEC (coder-decoder) combining CD-
quality stereo audio-digital converters for microphone and line-input levels.
The input sampling rate and format are programmable, as are the input gain
and output attenuation.
A
1
/
8
-inch mini-jack is used for the speaker output connection. The remain-
ing audio signals are via a 9-pin D-sub connector. Output impedance is nom-
inally 8 ohms, but higher impedance devices can also be driven.
For information on programming for audio, refer to
Using the Audio Devel-
oper’s Kit
(B2355-90069) and the man page
audio.