Audio control

Audio output is a single channel, square wave generator, with 8 levels of volume. I'm not entirely sure how it works since I do not have ways of testing hardware yet. This should be resolved soon, this is just a place holder page.

I'm thinking the system offers 2 audio channels, but only one audible at a time, with support to 'select' output from one, so you can do a pseudo mixer by latching overflow from the two channels, and swapping the buffers to give it a semi-polyphonic output. This, however, is simply unconfirmed hearsay.

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