This week it's the Lydian Dominant mode from the Melodic Minor scale. The chords are C7b5 to F#7b5.
You can download the mp3 of the track here: http://backingtracksforscales.com/C%20Lydian%20Dominant.mp3
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More backing tracks at http://backingtracksforscales.com
Photo by Alman1962 at sxc.hu