Drum grooves with no harmony on them. You build the bass line, and you hear how much it defines on its own.
Start with root notes only. Add movement once the pulse feels solid without it.
G Lydian Backing Track
G 12-Bar Blues Backing Track
A Ukrainian Dorian Backing Track
C 12-Bar Minor Blues Backing Track
C 12-Bar Blues Backing Track
F♯ Mixolydian Backing Track
D♭ Aeolian Backing Track
E♭ Dorian Backing Track
C Major Blues Backing Track
G Ionian Backing Track
C Aeolian Backing Track
Groove
D♭ 12-Bar Blues Backing Track
E 12-Bar Blues Backing Track
C Mixolydian Backing Track
D♭ Mixolydian Backing Track
A Phrygian Backing Track
B♭ Lydian Backing Track
E Major Blues Backing Track
E♭ Locrian Backing Track
F 12-Bar Blues Backing Track
B Dorian Backing Track
A Melodic Minor Backing Track
A Harmonic Minor Backing Track
D♭ Dorian Backing Track
E♭ Minor Blues Backing Track
A Dorian Backing Track
B Harmonic Minor Backing Track
G Major Blues Backing Track
A Aeolian Backing Track
C Ionian Backing Track
A♭ Ionian Backing Track
F♯ Aeolian Backing Track
A♭ Lydian Backing Track
E Ionian Backing Track
E Minor Blues Backing Track
C Lydian Backing Track
F♯ Ionian Backing Track