Gave a picture a description and deleted a false attribution.
m (Rob Kam moved page TWINPEAK to Rob Hordijk Twinpeak without leaving a redirect: top right menu > More > Move) |
Exeterdown (talk | contribs) (Gave a picture a description and deleted a false attribution.) |
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For example if the curve knob is closed the IN A signal only goes into filter one and in the final output you only hear the effect of filter one on the IN A signal. And thus it has a low-pass response as filter two does not get the input signal. That means that there is also not the subtraction at work that create the band-pass, as filter two gets nothing to subtract from the output. Then, by opening the IN A curve knob, the signal level of IN A into filter two is increased and now there is something coming out of filter two and the final output curve changes towards a band-pass curve.
[[File:RobHordijk-OSCSYNC-DUALENV-TWINPEAK.jpg|thumb|A Rob Hordijk TWINPEAK filter (right) in triple-module format with a DUAL ENV (centre) and OSC HARM (left)]]
=== Normalisations ===
Many of Rob's designs feature internal connections or 'normalisations' between inputs and outputs. These can be broken by inserting jacks into the inputs. The TWINPEAK filter often appeared in a triple-module configuration, featuring some module-to-module normalisations or connections between inputs and outputs.
* OSC SYNC - SUB SQR OUT > TWINPEAK IN A
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