[sdiy] DCO Question

[Eric Brombaugh]

Jitter / Aliasing - it's both!

Eliminating that "feature" of digital oscillators is the primary 
motivation behind the proliferation of antialiased oscillator algorithms 
and the proliferation thereof. Check out all the papers on BLEP, 
MinBLEP, PolyBLEP, DPW, etc.

Eric

On 11/02/2017 08:26 AM, Tim Ressel wrote:
> Hi,
> 
> I am making a digital oscillator (DCO) and was wondering if there is a 
> way to reduce the jitter one gets at higher frequencies. I understand it 
> comes from round off error (for lack of a better term): as the 
> accumulator reaches the top of the range the remaining amount is less 
> than the value being added, and that fraction changes every cycle. This 
> causes jitter, or is it aliasing? Anyway, is there a clever way to deal 
> with it?
> 
> Thanks!
>