Modular Diary – 012

With Audulus, as with most modular systems, the sequencer ‘control voltages’ are typically quantized before being passed on to an oscillator. I was keen to try out tunings with pure ratios and at first thought of piecing together a just intonation quantizer. However, since the sequencer knobs are fluid, it occurred to me that I could simply put together a small collection of ratio modules and connect them freely to the knobs. In this way some steps might be purely tuned while others could be set empirically.

The modules have an inbuilt reference pitch of 440Hz – that means that the 3:2 ratio will produce a pitch a perfect fifth above 440Hz. If the input is connected to a keyboard (or other) source the ratio will take that input as it’s starting point. The modules can be strung together so that the output of the 3:2 module can be connected to the input of a 9:8 module for example – producing a just second above the pure fifth.

Here’s an Audulus patch (very much a tryout, with the inclusion of all kinds of other bits and pieces I was experimenting with) demonstrating the approach.

Audulus Basic Sequencer Tryout

Modular Diary – 012: With @audulus, as with most modular systems, the sequencer ‘control voltages’ are typically q… rdgr.me/u/1iliqlx

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Rudiger Meyer is a composer interested in the play between traditional concert music and new media.


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