Teknor Industrial Computers PCI-934, Technical Reference Manual

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PCI-934 Technical Reference Manual
12-10
12.2 AUDIO FEATURES
Audio features are provided by the SoundPort

chip (AD1816A from Analog Devices),
plug and play multimedia audio subsystem, implemented to process multiple digital
streams of 16-bit stereo audio requirements.
The chip maintains full legacy compatibility with applications written for SoundBlaster and
AdLib, while servicing Microsoft PC 97 application requirements.
Provided features are:
12.2.1 LINE IN
§
Characteristics
Stereo analog input (left/right): each channel can be independently gained or
attenuated from +12dB to -34.5dB in 1.5dB steps. The left and right Line In signals
can be mixed in the analog domain with left and right Line Out signals.
§
Connection
Line In signals connect directly through the J23 Jack connector located on the edge
bracket.
12.2.2 LINE OUT
§
Characteristics
The analog stereo output can be post mixed with any of the analog input signals (Line
In, CD, Mic In). The summed analog signal enters the volume stage where each
channel of the Line Out can be muted or attenuated from 0dB to -46.5dB in 1.5dB
steps.
§
Connection
Line Out signals are available through the J21 Jack connector located on the edge
bracket. The same signals are also available on the Audio I/O connector (J18, pins 13
and 14).