These jam tracks loop over common progressions.

C

Neither major nor minor. Great for practicing parallel modes.

Cycle of 4ths (min 7)

Progression:
Am7 | Dm7 | Gm7 | Cm7
Fm7 | Bbm7 | Ebm7 | Abm7
Dbm7 | F#m7 | Bm7 | Em7 | Am7

Cycle of 4ths (dom 7)

Progression:
A7 | D7 | G7 | C7
F7 | Bb7 | Eb7 | Ab7
Db7 | F#7 | B7 | E7 | A7