Sound Card Block Diagram

Here is a block diagram, deduced from observations of a Creative Labs Soundblaster SB32-AWE.

                                    |                |
                                    |                |
    <Synth>----Synth---------------------SynthCap--->|
                    \               |                |
                     -------------->|                |
                                    |                |
                                    |                |
                                    |                |
    <PCM>------PCM----------------->|                |
                                    |                |
                                    |                |
                                    |                |
    <LineIn>----Line----------------------LineCap--->|
                    \               |                |
                     LineMute------>|                |
                                    |                |
                                    |                |
                                    |                |
    <Mike>------Mike----------------------MikeCap--->|
                    \               |                |
                     MikeMute------>|                |
                                    |                |
                                    |                |
                                    |                |
    <CD>--------CD------------------------CDCap----->|
                    \               |                |
                     CDMute-------->|                |
                                    |                |
                                    |                |
                                    |                |
                                 Master              |
                                    |                |
                               Treble/Bass           |
                                    |                |
                                  Ogain            Igain
                                    |                |
      ???               |<----------|                |
       |                |           |                |
    PC-Speak       [Amplifier]      |                |
       |                |           |                |
    <PC-Spkr>      <SpkrOut>   <LineOut>       <Digitizer>


Notes: