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 Forum index » Clavia Nord Modular » NM Classic (NM1 or G1)
Phase inversion and filtered noise
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Falk



Joined: Mar 07, 2006
Posts: 75
Location: Sweden
G2 patch files: 29

PostPosted: Tue Mar 14, 2006 12:20 pm    Post subject: Phase inversion and filtered noise Reply with quote  Mark this post and the followings unread

Who among us haven't filtered noise through high resonant bandpass filter to create a breathy organ sound? Well, I have anyway...

24db filter with bandpass at 6.6% was just a bit more then I could afford when striving for 4 voices (with 3 resonant peaks) on a micro.

The classic filter at 5.5% is mostly bandpass at high resonance and this lead to this idea. By feeding one LPF with the straight noise signal and the other LPF with a phase inverted signal the 'bass tails' cancel out.

Not a huge win by any account but it got me under 25%

By careful choice of phase and levels it can be further extended to more resonant peaks.

Regards
Falk


FilterNoise.pch
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Falk



Joined: Mar 07, 2006
Posts: 75
Location: Sweden
G2 patch files: 29

PostPosted: Thu Mar 16, 2006 6:59 am    Post subject: Just another example Reply with quote  Mark this post and the followings unread

Using three classic filters and a X-fader to make sure that the 'bass tails' cancel out.

Mod wheel: mix of 2:nd and 3:d octave
1:st knob: pitch env amount
2:nd knob: pitch env release


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