Things that listen or make noise. These are mostly built with a microphone and the p5.js library rather than as part of any more substantial grand plan. There are a couple of visualisers, a makeshift synth, a lighting rig simulator for a party that stopped happening in my head decades ago. None of this really needs headphones, but they help.
SP-20
A prototype web-based pocket synth
Cityscape
A cityscape that is generated based on the surrounding sounds (from light snoring to heavy traffic)
Sampler
A sampler oriented web-based music system (which is a work in progress)
The Light Desk
A simulation of a mid-1990s makeshift lighting rig for a dance party - including Kodak S-AV2000 slide projectors
Soundscape
Using the computer's mic this visualisation produces customisable patterns in response
Soundscape 2
A new soundscape using p5.js to generate the visualisations in response to sound