Tag: patch from scratch

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Pd Comb Filter Patch from Scratch

Building a comb filter in Pure Data Vanilla from scratch.

A comb filter is a filter created by adding a delayed signal to itself, creating constructive and destructive interference of frequencies based on the length of the delay. All we have to do is delay the signal a little bit, feed it back into itself (pre-delay), and we get that pleasing, high-tech robotic resonance effect.

There’s no talking on this one, just building the patch, and listening to it go.

0:00 Playing back a recorded file
0:35 Looping the file
1:00 Setting up the delay
2:08 Frequency controls for the filter
2:52 Setting the range
3:48 Automatic random frequency
4:25 Commenting the code
5:39 Playing with settings

More no-talking Pd patch from scratch:

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Subharmonics in Pure Data

Quick and easy Pure Data tutorial, making chords from subharmonics (like the Moog subharmonicon). The result is a kind of Coltrane-y generative music system.

Subharmonics are whole-number divisions of a frequency (as opposed to regular harmonics, which are whole-number multiples of a frequency). The resulting “subharmonic series” (or “undertone series”) is an inversion of the overtone series, with subharmonics getting closer the lower (i.e. higher division) that they are. Played together, these harmonics create harmonies quite distinct from those created with overtones.

I go up to the 9th subharmonic here, but of course you can just keep going.

There’s no talking on this one, just building the patch, and listening to it go.

More Pd Tutorials Here