This backing track employs the Melodic Minor Scale for practicing jazz improvisation over ii V7+ i [mMaj7] in All 12 keys.
Harmony and Scale:

Example: Improvised Jazz/Fusion lick/line over 2 5 1 Melodic Minor:

This backing track 2 5 1’s move in the cycle of 4ths:

Melodic minor ii V7+ i [mMaj7] all 12 Keys Chord Chart:

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