Topmusicanswers
Pick the diminished scale that contains the notes of the chord you want to play and use it. If no diminished scale contains all the notes of your chord, pick another type of scale. In a strict sense, the diminished scale is the whole-half scale, because that's the scale you want to use over a diminished chord.
Can you play a diminished scale over a minor chord?
So there you have it -- theoretically you can play any diminished scale, the chromatic scale and any whole tone scale over a minor (or major) chord . "The key to improvising is being able to play and listen at the same time."
