Watch the Dsus9 to Fsus9: G to Bb online guitar lesson by TrueFire from Play Jazz Guitar 10: Advanced Soloing Approaches
Lesson Source: Fareed Haque's Modal Improv Survival Guide
Dsus9 to Fsus9 jam track. Remember that the common tones between the 2 keys involved (G and Bb) are G,A,C and D, 4 out of 7 notes. The only notes that change are B to Bb, E to Eb and F# to F. Try to build ideas off of the common tones….but mostly groove, have fun and make some music!