Auto-generated chord chart from YouTube analysis
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 Smile Boy. Tutti analyzed the YouTube audio to extract key A Major, 143 BPM. a progression of 19 chords. Check the progression, each chord's notes and practice tips, then play along with the cursor in the Tutti app.
“Smile Boy” runs at 143 BPM in 4/4, in A Major. The chart spans 110 bars and uses 19 distinct chords, changing roughly every 1.7 seconds.
Part A, the most repeated section, loops C# → B → A#m → A → A — iii–ii–?–I in scale degrees.
12 of the chords need a barre (A#m, B, Bm, C#, C#m, D#, F#, F#m, G#, G#m, Gdim7, Gm), so this sits at a advanced level.
With a capo on fret 4 you can play it with F · F#m · Fm · G · Gm · G# … shapes instead — 10 of 19 become open chords.
Start around 100 BPM with a metronome and work up to 143.
| Part | Starts | Bars | Plays | Progression |
|---|---|---|---|---|
| Part A | 0:00 | 1–4 | 1 | C# → C# → A#m → F# → A |
| Part B ★ | 0:05 | 5–8 | 4 | C# → B → A#m → A → A |
| Part C | 0:11 | 9–12 | 1 | C# → C# → Bm → A#m → A |
| Part B ★ | 0:18 | 13–16 | 4 | C# → B → A#m → A |
| Part D | 0:25 | 17–20 | 2 | F → F → A#m → A#m → A#m |
| Part E | 0:31 | 21–24 | 2 | D# → D# → G# → B |
| Part F | 0:38 | 25–28 | 4 | E → B → B → C#m → E7 |
| Part G | 0:45 | 29–32 | 2 | A → G#m → Gm → Gm → F#m → F#m → B |
| Part F | 0:51 | 33–36 | 4 | E → B → B → G# → C#m → E |
| Part H | 0:58 | 37–40 | 3 | A → E → E → F#m → F#m → B → B |
| Part I | 1:05 | 41–44 | 4 | C#m → F# → F# → A → C |
| Part B ★ | 1:11 | 45–52 | 4 | C# → B → A#m → A → A |
★ most repeated — likely the chorus
The Roman numeral on each chord shows its function relative to the key, revealing the harmonic flow.