Hi guys back with another thread. In this video it talks about finding the passing tones for each mode scale. I did not know there were passing tones for each mode and they usually resolve to a more stable note. For instance, the 4th is a passing tone for Ionian and the b6 is a passing tone in Aeolian. But how to find the rest? Usually a good ear would give you a hint at it. Check out the video:
