A silent visual click for when you can't hear a beep over the kit

The whole 600x600 pulses with the beat so a drummer or anyone with in-ears gets a metronome they can feel without audio. Tap tempo with Enter, nudge BPM with up/down. The accent beat flashes brighter so you never lose the one.
Guitar shapes on a string grid you can glance at mid-strum
A pitch reference for tanpura, bagpipes, and anything that needs a steady drone
Tonight's running order, hands-free, so you stop forgetting what's next
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Came for a shift-light feel, stayed because the bright-on-accent makes it usable in my periphery while my hands are full. The 4/4 beat counter in the corner is a nice touch for not losing my place.
Good catch on the high-BPM jitter — above 200 the flash was tied to the animation frame instead of a fixed clock. Rewrote it on a steady timer, it's smooth to 300 in the next build. Odd meters are on the list too.
Pure visual click with no audio is the right call for a loud stage. One bug: when I nudged BPM up past ~200 with the up arrow the flash started skipping frames and the pulse looked uneven.
Tap tempo on Enter landed me right on 128 in three taps. Any chance of odd meters? My students do a lot of 7/8 and the accent-on-the-one flash would help them more than the beep does.
The brighter flash on beat 1 of 4 is what sells it — I can feel the downbeat without counting. With in-ears on at a gig the full-screen pulse actually cuts through better than a click.