Fixed:
- True-peak and correlation meters now receive real data. The background script was dropping the truePeak and correlation fields when relaying analyser data, so the true-peak hold mirrored the sample peak and the correlation meter was stuck at +1. The thin inter-sample true-peak hold line is now also actually drawn on channel and master meters.
- Vibrato no longer breaks at high depth. The delay buffer was too small for the maximum modulation depth, causing NaN output (silence) — the "Seasick" preset was unusable at 44.1 kHz. Chorus had the same overflow at exactly max depth. Both buffers were enlarged and reads are now clamped.
- Gate and expander are now stereo-linked. Envelope state previously carried over from the left channel into the right within each block, causing incorrect attack/release behavior and L/R level mismatches. Both now use a single detector across channels, matching the limiter.
- Distortion "Amount" now works in Overdrive mode. It previously had no effect; it now drives the input into the soft-clip curve (up to 10×). The transfer-curve visualization matches.
- URL presets no longer capture session state. Presets could save the global master fader level and solo state, forcing a stale master gain onto a channel when restored later. Snapshots now exclude these fields, and existing saved presets are migrated automatically on load.
- Solo and master mute no longer overwrite per-channel mute. Session silencing now uses a separate internal parameter, so un-soloing or toggling master mute can't desync a channel's own mute state, and combinations of solo + master mute resolve correctly.
- EQ editor shows the correct channel number after strips have been reordered.

Performance:

- Meters, spectrums, GR bars, LUFS readouts, and the correlation meter now redraw only when new analyser data arrives (20 Hz) instead of every animation frame (60 fps) — roughly a 3× reduction in sidebar canvas work, more with many tabs.
- Collapsed channel strips skip meter/spectrum drawing entirely (their canvases are hidden anyway). Clip detection still latches while collapsed.
- The EQ editor's response curves are recomputed only when fresh spectrum data arrives, instead of at 60 fps; interactive drags still render immediately.
- Reverb impulse-response regeneration is debounced — dragging Size/Decay no longer synthesizes up to 10 s of stereo audio on every slider tick.
- The content script's periodic page scan is much lighter: a cheap media-element check every 2 s, with the full shadow-DOM sweep only every 10 s. Noticeably less overhead on large pages like YouTube.


Changes:
* Added zoom controls