I recently found out the auxiliary diminished chord, and that I can play it over a dominant chord, but I'm not really familiar with it, I'm still trying to understand it, so there might be some mistakes below:
When a guitarist and a bassist(me) play a simple II-V-I like Dm7 | G7 | Cmaj7 | Cmaj7 and over the G7 chord, the guitarist (which is soloing) is playing an auxiliary diminished (G#) scale which only has a different note from G7 (G# instead of G natural), can I (the bassist) play that note (b9 -- G#/Ab) on my walking bass lines? Or Ι should try avoiding the b9?
Update: I made myself a bit more clearer.