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Forums - Synths & synthesis
Subject: virus filter
Original Message Date: 24-Sep-02 @ 03:37 AM - virus filter
Something I noticed while playing with the Virus - when I have one of the filters' Cutoff fully open and I increase Resonance I don't hear that sharp, bright (resononant?) sound as I do on other synths (Supernova, Waldorf Q & JP-8000) using a saw wave, instead the sound volume seems to be attenuated slightly. Can someone tell me why is this happening? Does the Virus have a different filter structure then those other synths I mentioned? I like that Saw sound with a fully open filter and Resonance at 90%, does that mean I can't get it with Virus?
Thanks in advance.
Thanks in advance.
Message 31/32 26-Sep-02 @ 07:11 PM - RE: virus filter
Nice one, nomad. I never knew about the ripple effect but it makes sense harmonically. Cool...
psylichon
psylichon
Message 32/32 27-Sep-02 @ 01:17 PM - RE: virus filter
OnAcid
Posts: 18
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From Christoph Kemper, CEO of Access Music, Gmbh.:
"Self oscillation is, when the resonance control - which is a sort of Feedback actually - can be set to values above 1, so the filter amplitude is increasing by itself until it hits the headroom, and than sticks there. This is identical in analog and digital domain. For the exitation, you need some signal. In the analog domain noise is always apparent, in digital domain you can add some dither noise to archive the same effect. But noise is not the reason for self oscillation.
The Virus filters do not allow self oscillation, but still allows very high resonances resp. Q-factors.
Waldorf does more to archive self resonance than simply adding noise. But that makes the filter sound different even on lower resonances ..."
Just turn up a bit of noise on the virus...full resonance...turn down the cutoff...et voila.
"Self oscillation is, when the resonance control - which is a sort of Feedback actually - can be set to values above 1, so the filter amplitude is increasing by itself until it hits the headroom, and than sticks there. This is identical in analog and digital domain. For the exitation, you need some signal. In the analog domain noise is always apparent, in digital domain you can add some dither noise to archive the same effect. But noise is not the reason for self oscillation.
The Virus filters do not allow self oscillation, but still allows very high resonances resp. Q-factors.
Waldorf does more to archive self resonance than simply adding noise. But that makes the filter sound different even on lower resonances ..."
Just turn up a bit of noise on the virus...full resonance...turn down the cutoff...et voila.
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