[sdiy] DCO resolution (avr talk)

[Antti Huovilainen]

On Thu, 23 Dec 2004 Christian.Bergmiller at daimlerchrysler.com wrote:

> All this AVR DCO PAO talk got me thinking...
> Which resolution is needed for a "good" sounding Phase Accu Osc. ?
> Is 0.01 Hz enough?

Certainly. The biggest limitation of low frequency resolution is the 
minimum beating frequency (or beating time). 0.01 Hz resolution gives you 
a maximum beating time of one and half minutes which is longer than many 
analog oscillators can do.

More important consideration for "good" sound is aliasing. You _Really_ 
want to avoid that. A trivial sawtooth at 44.1 kHz sampling rate is simply 
unusable past a few hundred Hz (and sounds bad before that already).

Antti

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