- Rename section header to EQ Studio with updated description
- Add ST/M/S channel select dropdown to each parametric band control
- Move Parametric EQ tab before AutoEQ
- Hide Original/Target/Corrected legend in parametric mode
- 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
- Pad band arrays when import/AutoEQ has fewer filters than MIN_BANDS
- Early return in applyAutoEQBands for zero enabled bands
- Persist interpolated gains before audio rebuild on band count change
- Derive export Q from actual octave spacing between adjacent bands
- Validate inputs in all GEQ storage setters
- Add Bands/Min Hz/Max Hz controls to legacy EQ section
- Dynamic frequency generation with log spacing and auto-scaling Q
- Import/export handles variable band counts, Q optional for shelves
- Custom presets interpolate across different band counts
- Update legacy EQ tutorial for new controls
- 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
- Preserve existing preamp when importing files without Preamp line
- Extend import regex to accept k/kHz/Hz suffixes and +signed gains
- Rename localStorage key to monochrome- prefix for backup/restore compat
- Add try/catch to localStorage writes for quota/disabled storage
- Validate custom preset gains array before applying
- Fix delete button visibility for all preset change paths
- Add overflow-x: auto for mobile EQ band scrolling
- Add flex-wrap and responsive sizing for bottom controls on mobile
Save button prompts for a name and stores the current 16-band gains
as a custom preset in localStorage. Custom presets appear in an
optgroup at the bottom of the preset dropdown. Delete button shows
when a custom preset is selected.
https://claude.ai/code/session_01AgSx7SP1dH5KFmpGXCAUvU
Export outputs EqualizerAPO-compatible format with all 16 bands.
Import accepts EqualizerAPO format or simple freq/gain pairs,
maps to nearest GEQ band by log-frequency distance, and ignores
Q values since legacy mode uses fixed dB sliders.
https://claude.ai/code/session_01AgSx7SP1dH5KFmpGXCAUvU
Replace usages of parseFloat(... ) || default and parseInt(... ) || default with explicit parse + isNaN checks to avoid treating valid numeric zeros as falsy. Changes in js/settings.js and js/storage.js update parsing for replayGain preamp, playback speed, scrobble percentage, equalizer band count, and font size so only NaN triggers the fallback value and valid 0 values are preserved.
Android:
- Fix stale wake lock detection by checking isHeld() before reacquiring
- Wrap startForegroundService in try-catch to handle launch exceptions
- Add START/STOP intent actions to prevent stop/start race condition
HTML/Accessibility:
- Convert preset and preamp spans to proper <label> elements
- Add aria-controls to database collapse button
- Sync aria-expanded state when toggling database panel
JavaScript:
- Guard auto-resume with source check to avoid resuming when not playing
- Add _calculateQ() fallback in fast-path EQ filter updates
- Persist graphic EQ gains and preamp to storage from setters
- Include 'legacy' in EQ mode restoration check
- Clear container before rebuilding GEQ bands for idempotency
- Use AbortController for document-level listener cleanup
- Apply gain calculation for non-parametric modes in touch snap
- Validate stored GEQ values are finite numbers
CSS:
- Remove non-standard appearance: slider-vertical property
setEQMode() was unconditionally setting isEQEnabled = true, overriding
the user's toggle state. Now respects equalizerSettings.isEnabled().
Also fixed the toggle handler to properly disable the graphic EQ chain
in legacy mode.
- Add 16-band graphic equalizer with legacy EQ mode
- Add speaker measurement and room correction EQ
- Fix audio skipping with AutoEQ on Android background
- Improve audio performance to prevent skipping under CPU load
- Fix dual EQ applied when switching between legacy and parametric modes
- Remove redundant Equalizer settings tab
- Improve mobile EQ band layout and collapsible database section
This will write each artist separately to the metadata rather than as a single concatenated string. This allows for better library searching if the player supports it.
If multiple artists are written to an m4a file, iTunes will only show the first artist.
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
