Access Virus TI reduced aliasing?
 

On another forum someone said to me that aliasing in the TI model will be less audiable because its using 192khz dacs. Can someone confirm this?

Cheers

DS

I dont think that has anything to do with aliasing, but I could be wrong.

I mean, that wouldn't explain why softsynth's alias.

Higher resolution makes smoother "blending" possible. So I think it reduces aliasing.

This is the original post...

'So, the new Virus TI, which uses 192Khz DACs will have less 'audible' aliasing than the old Virus B/C, as the nyquest frequency is now 96Khz. so you need to pick waveforms with harmonics higher than 96khz to get aliasing. So if you go for a waveform with a 100Khz harmonic, you hear a 92Khz harmonic (or rather, don't hear it). But this does mean an increase in processing power (remember you have samples to fill and at 192Khz, a *LOT* more samples to fill)'

So Juho does that make sence to you?

DS

Yup. As I said, more resolution -> Smoother blending -> higher frequencies.

Hurrayyyy..... :D :D :D

DS

The thing is, depending on how steep the filters are to stop frequencies above the Nyquist, we get a phenomena where a "ripple-back" effect takes place, causing some 'distortions'.....

Aparently, 'they' are now saying you can go too far with sample rates, and we should stick to 96kHz!!!

Which is real bad for me, seeing as my site name is 192k24bit.com :(

If you use more gentle slope filters that cut gradually, this effect is minimised. So if we start the roll-off from 44.1k all the way to 96k, it will be better??? So, the question is:

"How good/gentle are the anti-aliasing filters on the Ti??"

I'd be really surprised if the internal sample rate was upped to 192kHz. My guess is that the internal sample rate of the sound engine is the same as before, just that the converters can support 192kHz.

And there's no sense in that. It would be waste. The internal processing has to also be 192kHz or the high resolution DA is useless because on lower sample rates than 192kHz it would just be idle on most time in form of transforming data that has already been transformed.

Well, I'd love to be proven wrong but running the audio engine at 192kHz would take 4 times the processing power compared to 48kHz.