Evilander/newamp

Living Library — content-aware, programmable upgrade. Six new surfaces, a Bit-Perfect Path through the audio chain, sidebar redesign, performance pass with a regression smoke test.

New surfaces

• Audio DNA Engine — per-track perceptual feature vectors (RMS, brightness, flatness, dynamic range, rolloff, onset density, five-band energies) extracted via local FFT. Foundation for everything below.
• Living Tags DSL — write tag(midnight_drive) when bpm > 110 and dna.energy > 0.4 and genre matches "synth|wave" boost 1.5 and the library reactively re-tags itself. Sandboxed, three-valued null semantics, ReDoS-hardened, cycle-detected at save. Becomes a first-class power-search filter (tag:midnight_drive). No music player has shipped this before.
• Sonic Atlas — 2D PCA projection of your library by Audio DNA. Pan, zoom, click to play. Pampalk's 2002 Islands of Music at 359 tracks was the academic ancestor; this runs on 60K.
• Sounds Like — cosine similarity over DNA vectors. Surfaces in Now Playing under the Signal Bay with an inline "Analyze DNA" button if the track has no fingerprint yet.
• Library Radio Brain — toggle in Settings turns NewAmp into a tunable HTTP station. /library.m3u, /random.m3u, /tag/<name>.m3u, /audio/<id>. VLC on a phone, Sonos URL import, OBS audio source all work.
• Spectral Cover Art — deterministic procedural SVG covers for albums missing real art. Same library renders the same artwork across launches.

Audio chain

• Bit-Perfect Path — pin the Web Audio AudioContext to a chosen sample rate (44.1k–384k) so Chromium's resampler is a pass-through. Live indicator shows whether the rate actually matched the device. Setup guide documents WASAPI Exclusive (Windows) and ALSA hw: / PipeWire bit-perfect (Linux) — true kernel streaming is tracked as Phase 2 (native PortAudio addon).

UI

• Sidebar nav split into six labelled groups (Main / Explore / Discovery / Yours / Streaming / App) — 17-item flat list became six 2–4 item sections. Tools row (EQ / VIZ / DECK + keyboard hints) anchored in a bordered footer.
• Logo: shipped raster + ICO + new SVG vector wrapper rebuilt from a clean alpha pipeline. No more transparent-hair / ghost-eyes on light GitHub-mobile pages.
• README screenshot grid swapped to higher-density captures with section headers including a new Shape-changing decks row.

Performance

• recomputeTags and previewTagRule bulk-load DNA into a single in-memory Map<id, TrackDna> instead of running one query per track. bulkInsertTrackTags batches the result writes 500 pairs at a time. Full library re-tag on 60 000 tracks × 2 rules drops from ~3.9 s projected to 743 ms measured.
• Spectral SVG renderer gets a 512-entry LRU cache so scrolling album grids stop rebuilding every cover.
• analyzeTracksDna runs a three-worker pool.
• New npm run smoke:perf-bench synthetic 60 000-track regression detector with per-step budgets and live headroom ratio.

Verified

• Smokes added: smoke:dna, smoke:tags, smoke:spectral-art, smoke:radio-brain, smoke:sonic-atlas, smoke:perf-bench. All green at tag time.
• Frontier-reviewer + frontier-red-team passes against the DSL. ReDoS hardening (safeRegexTest), cycle-at-save, M3U sanitization, mid-stream-error socket teardown, daysSince casing — all landed.

Verify

sha256sum "NewAmp Setup 1.5.0.exe"      # → 049272FA1FF788642A9FD28A6509627C3C8C133841AADE25932DFD2BEB826DCD
sha256sum "NewAmp Portable 1.5.0.exe"   # → E85F4C6708FD815C289BD95F1332891A45A1AB17DD2063B2863992EA490A77BF
sha256sum "NewAmp Linux 1.5.0 x64.tar.gz"  # → 5E47D38B60458597CBA6304FB381B70AB2E0AF84F1B0D868D8310ACB720C690F

Full canonical manifest in SHA256SUMS.txt. Build provenance manifest in BUILD-PROVENANCE.json.

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