🚀 go-pugleaf

In article <C0F8Hp.84n@ve7frg.ampr.org> doug@ve7frg.ampr.org (Doug Collinge - VE7GNU) writes:
>From: doug@ve7frg.ampr.org (Doug Collinge - VE7GNU)
>Subject: "1-bit DAC"
>Date: Wed, 6 Jan 1993 07:22:37 GMT
>If my CD with a "1 bit DAC" and the aid of "8 times oversampling"
>can produce audio as good as an older CD with no "oversampling" and
>a 16-bit DAC then can my circuit with an 8-bit DAC be replaced
>with a 1-bit DAC and 4-times oversampling?
>
>How?  What's the math behind this concept anyway?

You are right but:
Eight times oversampling requires 2 bits dynamic range from sample to sample 
for the signal with 96dB abrupt change (16 bits). Since the voice and music 
don't have such changes, then, one bit range from sample to the next is 
suficient. The 8 bits and 4 times oversampling works if you don't saturate 
your DAC due to the fast rise/fall of the signal.
--
Peace and Prosperity!
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