Chords of: Blue Archive OST - Unwelcome School (Aiobahn Remix) by: Aiobahn. (Bb, Am, Bbm, F#7/A#) are the main chords of the song. The chords are displayed instantly in real-time with a YouTube player, four synced views, instrument diagrams, loop practice and a built-in vocal-remover mixer.
“Blue Archive OST - Unwelcome School (Aiobahn Remix)” by Aiobahn is in Bb Major and runs at about 185 BPM, giving it a fast, energetic pace. Our analysis found 38 different chords across 94 chord changes; the ones that carry the song are Bb, Am, Bbm, F#7/A#.
Bb is the chord you will hold longest — roughly 17% of the 2:34 the chords were tracked for. The song opens with A → A7 → Am → Fm7 → Am → Bbm → F#7 → Bbm. Play the timeline above to hear each change land in real time.
Difficulty: advanced — 7 main chords with 7 extended, altered or slash voicings. Guitar tip: put a capo on fret 1 and use A major shapes — the song stays in Bb Major but every chord becomes an open chord.
| Chord | Time held | Share |
|---|---|---|
| Bb | 0:26 | 17% |
| Am | 0:15 | 10% |
| Bbm | 0:14 | 9% |
| F7 | 0:14 | 9% |
| F#7/A# | 0:09 | 6% |
| E7 | 0:09 | 6% |
| A7 | 0:07 | 4% |
| Bb7 | 0:06 | 4% |
A – A7 – Am – F7 – E – Am – F7 – E – Am – F7 – E – Am – Fm7 – G/D – A7 – C – F7 – E7 – A7 – C – F7 – Emaj7 – Bm7b5 – A7 – Cm – F7 – E7 – Bm7b5 – Amaj7 – C6 – F7 – E7 – Dm – E7 – Am – Cm7b5 – Em – Dm – E7 – Am – D/C – C7 – Dm – E7 – Am – D/C – Cm7 – Em7 – …
