[sdiy] ms20 filter questions

[Dan Snazelle]

ok

i see

renee added more gain to the resonance opamp

(compared to the original)

so i just changed the resistor values in the opamp

my mistake before was trying to add resistors before or after it HIT the resonance opamp

thanks




http://www.catherinechalmers.com/videos.cfm






----------------------------------------
> From: subjectivity at hotmail.com
> To: synth-diy at dropmix.xs4all.nl
> Date: Mon, 27 Apr 2009 19:27:43 +0000
> Subject: [sdiy] ms20 filter questions
>
>
>
> using Renee's version as a starting point, i built an ms20 filter on breadboard using 13700's and a tl074.
>
> http://www.uni-bonn.de/~uzs159/rs20.png
>
> it does sound good BUT I am having a few problems:
>
> 1. it seems to almost ALWAYS self-oscillate if there is no input plugged in. only the first 5 percent or so of the pot does NOT self-oscillate. i would love to know how to REDUCE this!
>
> 2. when i DO have an input plugged in, it doesn't self-oscillate too much with diodes but a good amount with LEDS.
>
> i suppose my worry is that this filter only works right with a signal plugged in.
>
> i would love to hear about others experiences with this filter or with other ms20 clones.
>
> thanks!
>
>
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>
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>
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>
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>
> www.youtube.com/watch?v=V4nJPjGgOcU&feature=channel_page
>
> and soundtrack/design work:
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> NEW: check out Dan's sound design from the 1998 award winning film SAFARI by catherine chalmers
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