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Source document

[2026-02-18 17:50] ajaxdavis: ``` End-to-End Pipeline Chord Text → MIDI Generation → Track Splitting → Per-Track Rendering → Mix → MP3 Step 1: Chord Parsing - Reads chord symbols like Cm F#m7 Bb from text input - Auto-detects key, tempo, beats-per-chord from the progression Step 2: Style Selection - Picks a style (jazz, rock, folk, etc.) — each defines which GM instruments to use per track - e.g., Jazz: Rhodes (comp), Acoustic Bass, Tenor Sax (solo), Vibraphone (harmony) - e.g., Rock: Overdrive Guitar (comp), Pick Bass, Distortion Guitar (harmony) Step 3: MIDI Generation - Writes all 7 tracks into a single Type 1 MIDI file - Each track gets a GM program number (e.g., GM 0 = piano, GM 66 = tenor sax) - Applies variation parameters: swing, humanize, ghost notes, dynamics, articulation, etc. Step 4: Track Splitting (mido) - Splits the single MIDI file into 7 separate per-track MIDI files - Each track file has only one instrument on channel 0 Step 5: Per-Track Rendering (sfizz or FluidSynth) - For each track, looks up the GM program number in GM_TO_SFZ map - If mapped → renders through sfizz_render with the SFZ sample library (high quality) - If not mapped → falls back to FluidSynth with Timbres of Heaven SF2 - Each track becomes its own WAV file Step 6: Mix (FFmpeg) - Takes all per-track WAVs, applies volume offsets (Solo loudest at 0 dB, Pad quietest at -6 dB) - Mixes with FFmpeg amix filter into a single stereo WAV - Encodes to MP3 ``` [2026-02-18 20:16] ajaxdavis: https://gamma-production-6ee2.up.railway.app/ [2026-02-18 20:51] ajaxdavis: https://alpha.omegaai.dev/ https://gamma.omegaai.dev/ [2026-02-18 21:34] ajaxdavis: (files: gamma.mp3)