Already been done - I suggested this here about 6 months back. Although Hugo was receptive to the idea, there are bandwidth limitations which means that the spectrum could only be sampled up to about 15kHz. This would have the advantage that there would no longer be any objections to AC low-pass filtering at 16kHz...

One of the few remaining Mk1 owners... #00015
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One of the few remaining Mk1 owners... #00015