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>From: Paul 
>To: zuijlen@ibm.net
>Subject: Re: Higher numerical precission in Csound
>Date: Thu, 10 Jun 1999 3:33 PM
>

Your talking about sigma delta modulation, instead of recording the abosulte
voltage, it simply records whether it went up or down. The theory says if
you record at 16 times the sample rate of 16 bit audio with sigma delta
modulation you'll get the same quality. But it's actually easier and cheeper
to go to an even high sample rate than it is to increase the sample rate of
PCM. Sigma delta modulation can easily be convert to PCM and vice versa and
so a lot of companies use with say 128x oversampling, they can then use very
gentle analogue filters on the inputs and then use digital filters to
convert the sigma delta modulation data into a PCM.

> And then there's the _real_ lone nuts in the wilderness, who claim that
> PCM was a mistake from the get-go, and we should be converting