[sdiy] Novation peak NCOs

[paula at synth.net]

Richie,

   NCOs, where have I heard that before ;) ?

   In all seriousness, speed comes cheaply in FPGAs and a one bit DAC 
running at 24Mhz is also not expensive in terms of resources. That 
aside, remember if you generate a fast enough wave you don't have an 
aliasing problem to start with, so no BLITs, oversampling or other 
things needed to remove it, as it's not there to start.

   Where I think they'll suffer is taking the analogue output back into 
the DSP for digital effects, that said at £1200 for a 3 osc 8 voice poly 
is pretty good value for money.

Paula


On 2017-04-20 19:20, Richie Burnett 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,
> 
> Sent from my Xperia SP on O2
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy