Basslines in 13 styles, three at a time

Common progressions in this style

• C | G | Am | FI - V - vi - IV
• C | Am | F | GI - vi - IV - V
• Am | G | F | Ei - VII - VI - V
• C | F | G | CI - IV - V - I
• F | G | Am | AmIV - V - vi - vi
• Am | C | D | Fi - III - IV - VI

Add a chord (diatonic to the detected key)

Each press appends one chord. The key is estimated from what you have typed.