Built a wheel speed measuring device 24hrs before leaving for festivals, and it turns out that without absolute positioning (which I certainly don’t have time to build) it’s actually not much use as it doesn’t tell you anything that an audio recording of the trompette does in far higher detail.

The data could still be useful for controlling effects, but again, the audio level is a more accessible indicator of speed than actual measurement equipment.

For teaching purposes, the thing which would actually be useful (as always) is not the measuring equipment, but a UI which shows you trompette traces from pro players alongside yours in real time and allows you to compare them. I’ll have a go at prototyping this if I get time tomorrow and bring it along to Chateau d’Ars if it’s successful.