| The whole tone scale is rather specialized - chord-wise it fits over an augmented chord (e.g., C7(#5)). As in: 1, 2, 3, #4, #5, b7, octave. So, it's a six-note scale. Since there are only twelve notes in the chromatic scale, there are only two whole tone scales.
Then again, a portion of the whole tone scale, namely 1, 2, 3, #4, can be used over the IV chord of a Major key, so you can break up scales in your mind. You can do this with Maj or min pentatonic scales - you needn't play the notes consecutively or all of them, so many fills can be culled from various scales. But, in general, use the scale that fits the function of the chord. Your pentatonics come from there, but you are limited by use of the pentatonic in place of the full scale from which it is derived.
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The opinion of most musicians I have met is that the music industry sucks. This is because the music industry sucks. - Robert Fripp
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