Here‘s an interesting alternate controller I’ve not yet seen: a step sequencer where one composes a pattern by placing ball bearings onto a grid.
Though I don’t exactly have one in front of me, I would imagine the sensation of manipulating the device would be similar to patching a modular synth. There must be something entirely satisfying interfacing with music in this manner, akin to eating with a well-balanced set of weighted flatware.
A tangible rhythm sequencer. Ball bearings are used to trigger drum sounds. Visual feedback is displayed from underneath to indicate the current time and the state of each ball bearing.
The brainchild behind the Beat-Bearing Sequencer is Peter Bennett.