This relates to a query I found in the forums, although my answer did quite baffle the guy, so I thought I’d put it in a blog aimed at beginners and beginning-intermediate in exploration of the “easy” scale sounds.
When you have a progression, let’s say: C Em F G. And all you know is pentatonic’s, and want to know what sounds you could create with said pentatonic’s, then perhaps you could use this.
Now let’s move to Em pentatonic. Your first two chords being C and Em, this is the sound you will evoke with this scale over the C:
Em pent uses E, G, A, B and D. The E would basically help the 3rd of C ring out more, and the G would be it’s 5th. The A note would bring out the major 6th, the B would make it a major 7th and the D would bring out the spooky 9th.
Between F and G, you could even use a Fmaj pent (F, G, A, C, D). Against the G, the F would accentuate the b7th, which is inherent in this chord anyway, being the V of the key. The A would bring out the 9th, the C would bring out the 11th (if the 3rd was temporarily left out the chord, it would give it a suspended 4th feel, depending on how long you hold onto it), the D would bring out the 5th a little more.
When using pentatonics to solo with, your sound would never get as boring as you think. There is quite a rich world hanging around in pentatonics, that its only limit is your imagination. This is a small example of how to use something and which notes you would like to hang on to for flavour. I have seen quite a few posts that say pentatonics are so boring. This example only uses Em and Fmaj against two chords, the other two having it as their parent scale as such. There is a huge world to explore, even with pentatonics a semitone up and below the root note (when I have that lesson written up eventually, I’ll post it).
Good luck, enjoy!