[sdiy] NCO Jitter (was Large Numbers)

Vladimir Pantelic vladoman at gmail.com
Thu Jul 19 10:53:18 CEST 2018

On Thu, Jul 19, 2018, 08:50 Tim Ressel <timr at circuitabbey.com> wrote:

> Someone mentioned oversampling the NCOs and decimating. It seems to me the
> act of decimation just brings the problem back. Why not just filter the NCO
> straight and skip the oversampling/decimation?

because you already have inherent aliasing by simply creating the
saw/square wave at F_s, you cannot filter it out afterwards.

so you have to either create the wave at a much higher sample rate, filter
and decimate down. or you create it already with less aliasing using BLIT,
BLEP, DPW etc...

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