Four laptops, five fingertip pairs each. This page watches your hands through the camera; the conductor chooses the scene, and this page follows along on its own.
How to use this
Setup
Tested on Chrome, on Mac.
Pick which laptop this is (1–4).
Press start and allow the camera. The first time, the hand model takes a few seconds to load.
If you use an external webcam, pick it from the camera dropdown. It's remembered for next time.
Hold up both hands so the preview shows a line between each pair of fingertips. Each card shows what that pair is doing in this scene and what it will do in the next.
That's all — the conductor changes scenes and this laptop follows.
Troubleshooting
Make sure the computer volume is turned up.
Both hands have to be in the picture at once — values only change while the camera sees two hands, and hold where they were when it loses one.
Keep this tab in front. Chrome slows down camera tracking in a tab you can't see.
If the scene bar says it can't reach the conductor, check the wifi. The laptop keeps playing the last scene it heard, and catches up as soon as it reconnects.
Touching fingertips read as a true 0: a small dead zone at the bottom (thumbs/middle/pinkies 5, index/ring 7 out of 126) keeps jitter out. That's intentional.
If the camera won't start, check System Settings → Privacy & Security → Camera, and that no other app is using it.
Backup: external tracker over MIDI
Only if the built-in camera tracking fails. Open
the tracker preset,
turn on its camera and MIDI on IAC Driver Bus 1, then here: stop the camera, press request MIDI and pick the bus.
–Waiting for the conductor…connecting
Hands
camera off
Press start to turn on the camera.
Voices
value = fingertip distance (0–126) · bar = what this pair is sounding