Model 743 Board Computer Overview
Audio
AudioHP-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 743i. 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 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 Devel- oper’s Kit (B2355-90069) and the man page audio.
This feature is not supported by HP-RT.
