Indigo (R3000 and R4000):
    - Stereo analog input (line input or mic (mono) input)
    - Stereo analog output (simultaneous speaker/headphone & line out)
    - Serial digital input (supports AES and S/PDIF encoding)
    - Serial digital output (supports AES and S/PDIF encoding)
    - Independent input and output sample rates including:
	8, 11.025, 16, 22.04, 32, 44.1, and 48.0 kHz
    - 3.5 mm connectors
    - microphone (mono) included
    - mono speaker

  Indigo2 & Indy & Audio/Serial Option:
    - Stereo analog input (line input or mic input)
    - Stereo analog output (simultaneous speaker/headphone & line out)
    - Stereo microphone support
    - 4-channel analog input and output using mic connector as second input
	pair and headphone connector as second output pair
    - Serial digital input (supports AES and S/PDIF encoding)
    - Serial digital output (supports AES and S/PDIF encoding)
    - Independent input and output sample rates including:
        8, 11.025, 16, 22.04, 32, 44.1, and 48.0 kHz
    - 3.5 mm connectors
    - microphone (mono) included
    - mono speaker

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End of sgi/faq/audio Digest
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