'Harmony Bug!' Does Google Lyria Actually Understand Harmony?

I handed Google Lyria a chord chart. Here's what it actually played. Five tests, 101 takes, four Lyria engines, one day. Words, a full chord chart, every note spelled out, the real settings, and finally harvesting what it gave me. Every bar read back and named by THIRI. Along the way I found a bug in Lyria RealTime's scale knob (the E-flat major / C minor setting does nothing), reported it to Google, and got a reply. This is day 1 of a 30-day stretch: one long-form video a day. Tomorrow: Google Magenta. TRY IT YOURSELF Knob box, play with Lyria RealTime without opening Google's tools (free): https://build.thiri.ai/innovate/knob-box Your first THIRI key is free: https://build.thiri.ai/keys The research I don't put on the internet: THIRI Builders on Skool CHAPTERS 0:00 Intro 1:38 The one question 2:58 Test 1: ask in words 4:19 Blues in F: 30 takes, the prompts and what it played 8:51 Test 2: write the chords 11:24 The result I almost posted (p = 0.05) 11:45 Test 3: spell out every note 14:14 Test 4: use the settings 16:36 What a seed actually is 17:02 The scale knob is a key signature 17:42 The Harmony Bug (E-flat major / C minor) 19:36 The scorecard 20:41 Test 5: harvest and patch 23:25 Settings listen, words don't 25:12 Control and expression 26:11 How long Lyria takes to hear a chord change 27:18 Talk to it, or play it 27:57 Day 1 of 30 28:57 Outro: the montage THE NUMBERS Test 1 (words): asked A-flat, played A. 0 of 8 chords in A-flat. Blues in F: 0 of 30 takes in F. Test 2 (chart): 18 takes asked for G, 0 landed in G. The best take lives in A-flat major (91% of its notes). Test 3 (every note): roots matched 15% (chance is about 14%). Test 4 (settings): 93% of notes in the scale (chance 58%), tempo exact, seeds replay bit for bit. Test 5 (harvest): 8 of 8, by construction. Harmony Bug: scale=E_FLAT_MAJOR_C_MINOR is byte-identical to no scale, 4 of 4 same-seed pairs, October 1 and again October 30. Reported to the Google AI Developers Forum October 11, answered October 12 (workaround: D major / B minor, pitch-shift up a semitone). Independent THIRI test. Not affiliated with or endorsed by Google or Anthropic. Dennison Blackett, Blues Prince Media build.thiri.ai #Lyria #GoogleDeepMind #AIMusic #MusicTech #THIRI #LyriaRealTime #Magenta