The band moved at the producer's 30 Hz. Raising TARGET_FPS would have been the
obvious knob, but it lives in qbz-audio and is shared with Slint, and the
amplitudes are already EMA-smoothed in Rust to roughly 6 Hz — a faster producer
would have bought CPU and no smoothness.
The published frames are now replayed across the render frames that follow
them, which is what Slint's dock gets from its per-bar 90ms animate. A late
publish degrades to a hold instead of a jump, and the motion runs at the
display's rate rather than the data's.
Splits the strip out of the dock into SpectrumBand, so the dock file owns only
the gating and the layout arithmetic.
cc
vicrodh
4b34b70f70