The Yamaha AN1x Synthesizer mailing list

For basses (low frequency fundamental) aliasing is not a big problem.
 Harmonics lie closer to each other in the spectrum and few reach
above the nyquist frequency, at which they fold/mirror down. I
recognize aliasing by watching the spectrum in real-time with the
plug-in i mentioned. When I modulate the pitch aliased components move
in the wrong direction.

If you like bright sounding VCOs, use them. But for those who want
analog sounds, avoid aliasing with the method i described.

Martin


--- In AN1x-list@yahoogroups.com, "Summa" <flotorian@f...> wrote:
> The downside is, that basses sound dampened without the high
harmonics. At 15khz -
> 70db it shouldn't be a problem, since most ppl. won't recognise it.
Afaik only 
> aliasing/mirror frequencies at lower frequencies are realy
inlfuencing sound 
> quality...
> Other than that how do you know it's aliasing? 
> 
> ...Summa
> 
> 
> On 11 Apr 2005 at 12:49, d97macla wrote:
> 
> > 
> > 
> > The AN1x is very versatile as you know. It can generate a lot of
> > aliasing for example. To get analog sounds you should avoid that with
> > the Edge control of the VCOs. I have tested it with the excellent free
> > vst plug-in Frea(k)oscope from smartelectronix.
> > 
> > To get all aliasing components up to 15kHz below -70dB relative to the
> > fundamental I found these upper limits for the Edge value:
> > 
> > <Fundamental> Hz : <Edge value>
> > 125  Hz : 105
> > 250  Hz : 95
> > 500  Hz : 85
> > 1000 Hz : 75
> > 2000 Hz : 65
> > 4000 Hz : 55
> > 
> > As a rule, Edge values below 80 will remove a lot of aliasing.
> > 
> > Martin
> > 
> > 
> > 
> > 
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