fromis_9 (프로미스나인) 'Supersonic' Official MV guitar chords
Auto-generated chord chart from YouTube analysis
About Tutti
Tutti is a free tool that analyzes a YouTube link or audio/video file to detect the key, tempo (BPM), time signature and chord progression, then builds guitar chord charts and TAB. Results are shown with a playback cursor so you can play along.
A chord progression lists the chords in the order they change. At each chord name (e.g. G, Em, C), fret that chord and strum in time.
Guitar chord chart for fromis_9 (프로미스나인) 'Supersonic' Official MV. Tutti analyzed the YouTube audio to extract key F# Minor, 143 BPM. a progression of 22 chords. Check the progression, each chord's notes and practice tips, then play along with the cursor in the Tutti app.
Song notes
“fromis_9 (프로미스나인) 'Supersonic' Official MV” runs at 143 BPM in 4/4, in F# Minor. The chart spans 102 bars and uses 22 distinct chords, changing roughly every 1.5 seconds.
Part A, the most repeated section, loops F#m7 → Em7 → Em7 → A → Dmaj7 → C#m7 → C#m7 — i–VII–III–VI–v in scale degrees.
13 of the chords need a barre (Bm, Bmaj7, C#, C#7, C#aug, C#m, C#m7, C#maj7, D6, F#7, F#m, F#m7, Faug), so this sits at a advanced level.
With a capo on fret 2 you can play it with G · G7 · A7 · Am · Amaj7 · B … shapes instead — 15 of 22 become open chords.
Start around 100 BPM with a metronome and work up to 143.
Tempo swings by ±21.3 BPM, so follow the recording rather than a metronome.
Dynamic range is 17 dB — a moderate swing between soft and loud passages.
The first chord lands at 5s, so there is a short intro before you come in.
Balance of the mix: Bass 34%, Vocals 28%, Drums 23%.
The vocal sits between E3 and A♯5 (centred on E4), which helps if you are picking a key to sing in.
Song structure
| Part | Starts | Bars | Plays | Progression |
|---|---|---|---|---|
| Part A | 0:00 | 1–4 | 1 | D |
| Part B ★ | 0:06 | 5–8 | 4 | F#m7 → Em7 → Em7 → A → Dmaj7 → C#m7 → C#m7 |
| Part C | 0:13 | 9–12 | 1 | F#m7 → Em → A → A → D → C# → C# |
| Part D | 0:20 | 13–16 | 1 | F#m → D → D → A → F#m → D → C# |
| Part E | 0:27 | 17–24 | 2 | F#m → A7 → A → A → Dmaj7 → C#m7 → F#m7 → Em7 |
| Part F | 0:41 | 25–28 | 2 | F#m → F#m → Dmaj7 → C#m → C#m |
| Part G | 0:47 | 29–32 | 2 | F#m → F#m7 → Em7 → Em7 → B7 → Dmaj7 → Dmaj7 → C#7 |
| Part B ★ | 0:54 | 33–36 | 4 | F#m7 → Em7 → Em7 → Faug → Dmaj7 → C#m → C#m |
| Part H | 1:01 | 37–40 | 3 | F#m7 → Em7 → Em7 → Dmaj7 → C#m7 → C#m7 → F#m7 |
| Part I | 1:08 | 41–48 | 3 | F#m7 → E7 → Dmaj7 → Dmaj7 → C# → C# → F#m7 → E7 |
| Part J | 1:22 | 49–52 | 1 | F#7 → F#7 → Bmaj7 → D6 → C#7 → C#7 |
| Part K | 1:29 | 53–56 | 1 | F#m → E → A → D → C#aug → A → F#m |
★ most repeated — likely the chorus
Practice tips
- At about 143 BPM it's fast — start slow and build up speed.
- 22 chords are used. Loop the sections where chords change quickly.
- This song is in F# Minor; practicing other songs in the same key builds your chord sense.
Chords used & their notes (fingering reference)
The Roman numeral on each chord shows its function relative to the key, revealing the harmonic flow.
Chord progression
