Live paid run · June 10, 2026
Ouroboros Telephone
THIRI acted as fitness selector and mutation engine while MusicAPI.ai covered each winning clip through three generations. The run gathered every public artifact from the loop: generation audio, stems, MIDI, WAV, artwork, and a full credit ledger.
THIRI + MusicAPI.ai
What was tested
The second run tested a closed evolutionary loop: generate, measure the returned harmony, select the fitter clip, mutate that measured harmony through THIRI, then ask MusicAPI.ai to cover the winner into the next generation.
The seed was a closed Coltrane major-third cycle: Cmaj7 | Eb7 | Abmaj7 | B7 | Emaj7 | G7 | Cmaj7 . Each generation returned two clips. Both clips were converted to MIDI, locally reduced into chords, scored against the current brief, and then the winning clip reproduced through cover_music .
The final lineage did not obey the original cycle at first. It settled into a desert-blues G-minor/C-minor world, then became more self-consistent every generation: fitness climbed from 0.5557 to 0.7438 to 0.9696 .
169
credits traced
3
generations
0.9902
lineage score
25
public assets
Playable outputs
Audio assets
Every public audio file from the experiment is playable below: six generation clips, four finale stems, and the final winner WAV.
Finale stem A
Vocals · b8e2e4eb
One of two vocals records returned by /sonic/stems/basic. The stem task again returned four succeeded records, not a fixed pair.
Finale stem C
Vocals · 8af7a2d9
Second vocals stem record from the final winner. Its lyrics preserve the amnesia accident: sparse mutation lines around mostly empty sections.
Finale stem D
Instrumental · 3143e129
Second instrumental stem record. The implementation lesson from experiment 1 was applied here: select by title before doing chord reduction.
Generated imagery
Visual assets
The public image set includes the generated album cover and the six MusicAPI.ai clip artworks from the three-generation lineage.
Symbolic layer
MIDI, ledger, and metadata
The run isolated every paid call: create_music and cover_music were 15 credits each, MIDI was 15 credits per clip, stems/basic was 15, WAV was 2, and aligned lyrics was 1.
The final instrumental stem measured 0.9902 against the previous generation's winner and 0.6098 against the original Coltrane seed cycle.