When writing fields, we track where they are, so we can create correct vtables later.

We zero out when rate == 0

Update the 0xc0 register for all channels to signal the switch to mono/stereo handlers

Called at the start of a table to increase counters measuring data structure depth and amount, and possibly bails out with false if limits set by the

Verify the vtable of this table. Call this once per table, followed by VerifyField once per field.

Special case for string contents, after the above has been called.