I Knew You Were Trouble.

This transcription starts in G♭ major.

The estimated tempo is 154 BPM, calculated from the median spacing between detected beats. This is a summary of the transcription; timing can vary during the song.

Recurring four-chord sequences in this transcription include G♭ → D♭ → E♭m → C♭ (21 occurrences); E♭m → C♭ → D♭ → G♭ (19 occurrences); C♭ → D♭ → G♭ → D♭ (17 occurrences). These are exact chord-label matches within sections, not a complete harmonic analysis.

Recurring relative progressions include I → V → vi → IV in G♭ major; vi → IV → V → I in G♭ major; IV → V → I → V in G♭ major. Numerals refer to the key active at that point; uppercase means major and lowercase means minor. Minor keys use natural-minor scale degrees.

The transcription contains repeated matches to the four-chord pop progression (I → V → vi → IV); the singer-songwriter progression (vi → IV → I → V). Added tones and inversions may vary. This identifies a familiar pattern, not a claim about the song’s influences.

The transcription starts in 1/8. Later meter changes are detected at 0:00 (4/4).

The detected sections are intro (0:00) → verse (0:00) → pre-chorus (0:28) → chorus (0:40) → verse (1:18) → pre-chorus (1:43) → chorus (1:55) → bridge (2:32) → chorus (2:46).

The transcribed version lasts 3:39. Other recordings or edits may have a different duration.