[sdiy] Novation peak NCOs

[rsdio at audiobanshee.com]

I'm not sure whether my question is answered in this long thread, but what is the bit depth at 24 MHz?

The reason I ask is that SACD runs at 2.8224 MHz, but it's only running 1 bit sampling. By the time SACD is converted to something we can listen to, it's equivalent to 20-bit at something more than 40 kHz. So, before we all go converting the Nyquist frequency for the claimed 24 MHz sampling rate, it would be helpful to know the bit depth. I've designed with DAC chips that are rated to 125 MHz, but that one is only 14-bit.

Brian


On Apr 20, 2017, at 10:20 AM, Richie Burnett <rburnett at richieburnett.co.uk> wrote:
> An interesting direction Novation are taking with the use of FPGA based NCO oscillators on their new hybrid polysynth. There's a video from Superbooth about it on sonicstate. It uses a sample rate of 24MHz to generate classic analog saw, pulse, tri waves, etc, then feeds them through conventional analog VCF, VCA, etc.
> 
> Seems like a bit of a brute force way to crack the old aliasing nut, but I guess it gives them the ability to do some wacky audio rate modulation stuff with reduced aliasing too.
> 
> -Richie,
>