[sdiy] Roland Filters / IR3R05

[Scott Nordlund]

> So this idea changing the cap values is another possibility to explore. I will look at the datasheet to learn more.
> Another thing interesting to me, would be to add some circuitry to bypass the first 2 cap, to provide a 12db/oct only mode wich is always nice for the pads.

It should work well enough as a 2-pole filter as long as the resonance is turned down, but I think adding resonance will change the cutoff frequency as well.

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