Published by PitchChanger · Updated · How these guides are made
How to use this workflow
Locate the passage
Write bar numbers and a consistent beat unit while listening to the full mix.
Compare the evidence
Solo the other stem to locate candidate changes. Mark each change at a beat or subdivision, leaving the chord name blank if unclear.
Save a usable reference
Check the bass and melody before naming inversions or non-chord tones. Rehearse the change locations independently of identifying every chord.
Worked example and evidence boundary
In an authored four-bar 4/4 example at 90 BPM, each beat lasts 2/3 s. Bar 1 has one chord for four beats, bar 2 has two chords for two beats each, and bars 3–4 hold one chord for eight beats. Their durations are approximately 2.67 s, 1.33 s per chord, and 5.33 s. The tempo stays 90 BPM throughout.
What to verify before using the result
An accompaniment estimate can group guitar, piano and other instruments. It does not return chord labels or sheet music. Reverberation can overlap a real boundary; distinguish an older chord tail from a new attack and keep ambiguous changes provisional.
Common questions
Does faster chord movement mean the BPM increased?
No. Chords can change more frequently while the quarter-note pulse remains steady. Count beats per chord separately.