- 🎚️ Left-edge volume fader per player (drag; MatrixChunky8 readout) driving a new bios tape:volume (smooth 80ms ramps). - 🛰️ BroadcastChannel jam bus: sibling AC windows (Electron panes or browser tabs) heartbeat readiness; volume auto-scales by 1/√windows so a band never clips; '3win' badge top-right. - 🎬 Coordinated drop: panes boot ARMED (silent) until every sibling is ready, then all ramp in on the same UTC bar — async waiting with an 8s timeout so a pane that never loads can't hold the band hostage. - 🖲️ Deck-key legend rows are buttons now: tap ←/→ beat-jump, hold the chop rows, tap reset — same code paths as the keyboard. - 🔙 Back only when arriving from recording; synthtape players have no cap to return to. - 〰️ sine synthtape reworked: plucked 16-step half-beat melody, lower register, octave dips + rests — percussive, still seam-perfect. - scrub-jam: per-window virtual cursors (visible arrow + label, machine twin at window.__jamCursor) and nogap pane URLs (flush bottom bar). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>