Chord Accompaniment

Enter any chord progression → Generate accompaniment instantly. A pocket band for practicing scales, chord tones, and improvisation.

Global Key

Band Stage Layout

Transposing instruments: C Concert Pitch · B♭ Up Major 2nd · E♭ Up Major 6th.
🖐 Drag musicians: Left/Right = Pan, Front/Back = Volume; Double-click = Mute/Unmute; Click Horns = Change Timbre.

Ready

🎯 Lick Practice · ii-V-I Vocabulary

20 original 2-5-1 licks. The sheet music updates automatically when transposed. Practice through all 12 keys.





Key C: Dm7 → G7 → Cmaj7 Ready

Chord Accompaniment Machine

Separate bars with "|"; separate two chords in a bar with a space, e.g., Gm7 C7.





💾 My Progression Library


Ready

✏️ Click any bar below to edit directly (press Enter), changes will sync to the text box above.

🎹 Piano90%
🎸 Bass100%
🥁 Drums80%

Jam Wizard

(Click a dot to go back)
1
2
3
JAZZ BAR JAZZ BAR

Step 1 / 3 — Choose a Song (Background changes per song)

🌸
Bang Chhun-hong
Taiwan · Ballad
🍂
Sikuihong
Taiwan · Upbeat
🎺
When the Saints Go Marching In
New Orleans Traditional

Step 2 / 3 — Choose Tempo

Ballad
♩=72
Medium
♩=100
Medium-Up
♩=132
Up
♩=168
Burnin'
♩=208

Step 3 / 3 — Choose Style

🥃
Swing
🌊
Bossa
🔥
Latin

Lead Sheet · Jam Room

Select a song, press ▶ to start Jamming; 1st time plays the theme, 2nd time auto-generates a solo.





Ready

➕ Add/Edit Custom Song

Import a MIDI file to replace the melody.





Immersive Venue

Change scene → Generates synthesized ambient soundscape (No audio files).

Current: None