A Patch A Day, No. 15

Published on May 23, 2013 hamiltonulmer·15 videos

"A straightforward patch that demonstrates, pretty clearly, the strong relationship between pitch and rhythm.

We use the Dixie II (playing the LFO, outputting a square) as a clock source, and also as a means of modulating the pitch of the two channels of the DPO.

The magic comes entirely as one of the channels of the Maths very, very slowly ascends, increasing the frequency of the Dixie II. As the frequency spins higher, the Clock Divider follows closely, and the DPO spits out what feels like new pitches altogether, despite what you're hearing being the "same" as you heard at the beginning.

Here I use the Graphic Sequencer to create something of an new oscillator as well. By alternating between 0 and 5v, the signal goes into the STRIKE input of the FOLD section of the DPO. As the frequency increases, so does the pitch. Go figure.

The same happens with the MMG, but with a different effect altogether. The MMG ACCENT occurs at a quarter the frequency as the STRIKE circuit on the DPO, and the STRIKE on the MMG occurs at a 16th the frequency. The result is fucking gorgeous - these rich overtones appear, other wonderful overtones have counter motion, and the rest is history."

STG sequencer.