This video captures a demonstration by Chris Stack (experimentalsynth) of using the Koushion sequencer, running on an iPad, to sequence the filter bands on the Moog MIDI MuRF – ‘essentially creating your own patterns on-the-fly’.

The MIDI MuRF (Multiple Resonance Filter Array) is a Moog filter that lets you sequence its 8 filters in 24 preset patterns. It has extensive MIDI support, though, which opens up a lot more options, like this.

Koushion is available in the App Store for $9.99.