- Add per-band M/S processing with full encoder/decoder matrix in Web Audio API
- Right-click context menu on EQ nodes for filter type and channel switching
- Right-click empty graph space to add nodes
- Remove nearest-node snap-click interaction
- Replace IIR shelf filters with native BiquadFilter for glitch-free updates
- Add 6 M/S showcase presets with research-informed mastering values
- Add 5 shelf-based stereo presets (Warm, Bright, Hi-Fi, Dark, Radio Ready)
- Standard presets now reset all bands to stereo/peaking
- Graph contrast fix for light themes using color-mix()
- Colored help button and rewritten how-to documentation
- Default graph zoom changed to ±16 dB
- Add Export APO button to legacy graphic EQ (GraphicEQ config line format)
- Fix shelf filters ignoring Q: use IIR filters with RBJ cookbook coefficients
- Update graph visualization to use actual Q for shelf curves
- Omit Q from shelf filters in all EQ text exports
Engine & algorithm:
- Use default shelf Q (1/√2) in calculateBiquadResponse for shelf filters
- Compute normalization offset on measurement frequency grid to avoid bias
- Try stale cache for all fetch errors in autoeq-importer, not just timeouts
Audio pipeline:
- Pass postProcessingQuality (preserves Dolby Atmos override) in api.js
- Persist custom band frequencies in equalizerSettings storage
- Restore custom frequencies on _loadSettings instead of regenerating defaults
- Export clamped preamp value in applyAutoEQBands text output
- Propagate filter type and Q values through equalizer import chain
- Update freqRange after importing custom filter frequencies
- Remove return in finally block that hid LOSSLESS fallback failures
Data consistency:
- Normalize artist IDs with String() in blockArtist/unblockArtist
Lint & code quality:
- Annotate empty catch blocks (Atmos codec probes)
- Remove unused catch parameters
Accessibility:
- Add aria-label and for attributes to all AutoEQ form controls
- Add role="status" aria-live="polite" to feedback spans
- Update filter type documentation to reflect shelf support
- Hide parametric-only sections by default to match active tab
UI:
- Move AutoEq button directly under graph
- Hide shared button in Parametric/Speaker modes
- Replace hardcoded white legend dot with theme-adaptive color-mix
- Add pointer-events:none and focus-within to profile delete button
