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 [MV] IU(아이유) _ Through the Night(밤편지). Tutti analyzed the YouTube audio to extract key G# Major, 79 BPM. a progression of 27 chords. Check the progression, each chord's notes and practice tips, then play along with the cursor in the Tutti app.
“[MV] IU(아이유) _ Through the Night(밤편지)” runs at 79 BPM in 4/4, in G# Major. The chart spans 79 bars and uses 27 distinct chords, changing roughly every 2.5 seconds.
24 of the chords need a barre (A#, A#7, A#m, A#m7, A#sus4, B, C#, C#7, Cm, Cm7, D#, D#7, D#maj7, F#6, F#maj7, F7, Fm7, G#, G#m, G#m6, G#m7, G#maj7, Gm, Gm7), so this sits at a upper-int. level.
With a capo on fret 3 you can play it with G · G7 · Gm · Gm7 · Gsus4 · G# … shapes instead — 16 of 27 become open chords.
Start around 55 BPM with a metronome and work up to 79.
Tempo swings by ±26.8 BPM, so follow the recording rather than a metronome.
Dynamic range is 33 dB — a wide swing, with 28% of the song played quietly.
The first chord lands at 20s, so there is a short intro before you come in.
Balance of the mix: Vocals 38%, Guitar 27%, Bass 15%.
The vocal sits between A♯2 and B5 (centred on F4), which helps if you are picking a key to sing in.
The Roman numeral on each chord shows its function relative to the key, revealing the harmonic flow.