>Am I nuts?

Not nuts, just a bit misguided. The inaccuracy of the MSBits DAC would swamp
the LSBits DACs output completely (most DACs are specced at about +/- 1LSBit
accuracy).

>Can this be done?

Sorry, no.

> In the audio world if you were to playback just the MSB? what would it
sound like, the LSB only accounts for 1/256 of the votage out, if the data
was 0x5500 vs 0x55ff ?> the difference would only be 1/256 of full scale? So
it sounds like it would make no difference.

The difference is the same as the difference between an 8-bit and a 16-bit
WAV file. Very noticable indeed. This is because of the much higher
quantization noise, especially as it affects quieter parts of the audio.

Bob Ammerman
RAm Systems

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