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 I’m HERO (나는야 HERO). Tutti analyzed the YouTube audio to extract key D Major, 115 BPM. a progression of 8 chords. Check the progression, each chord's notes and practice tips, then play along with the cursor in the Tutti app.
“I’m HERO (나는야 HERO)” runs at 115 BPM in 4/4, in D Major. The chart spans 73 bars and uses 8 distinct chords, changing roughly every 1.6 seconds.
Part A, the most repeated section, loops D → D → D → Bm → Em → A → D → D — I–vi–ii–V–I in scale degrees.
2 of the chords need a barre (Bm, F#m), so this sits at a upper-int. level.
With a capo on fret 2 you can play it with G · G7 · Am · C · Dm · Dm7 … shapes instead — 8 of 8 become open chords.
Start around 81 BPM with a metronome and work up to 115.
The pulse holds within ±3.0 BPM, so it tracks a metronome well.
Dynamic range is 23 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: Vocals 30%, Drums 24%, Bass 22%.
The vocal sits between A2 and D♯5 (centred on D♯4), which helps if you are picking a key to sing in.
| Part | Starts | Bars | Plays | Progression |
|---|---|---|---|---|
| Part A ★ | 0:04 | 1–40 | 8 | D → D → D → Bm → Em → A → D → D |
| Part B | 1:01 | 41–48 | 1 | G → A → F#m → Bm → Em7 → Em → F#m → G |
| Part A ★ | 1:10 | 49–72 | 8 | A → D → D → G → D → D → F#m → Em |
★ most repeated — likely the chorus
The Roman numeral on each chord shows its function relative to the key, revealing the harmonic flow.