[TOMT][ANIMATION][1990s] Fantasy children's TV series featuring anthropomorphic mice (it's not Redwall)
Okay, so I remember this tv show that I only ever watched half an episode of, and I really wanna figure out what it was. It was a hand-animated 2D tv series. I believe it aired on PBS on Sundays while I was at church, and so I never got to actually watch it.
In the show, there are two mice (they might have been another small animal creature, I don't remember them that well), one boy and one girl. In the episode they are trying to solve some riddle or mystery which has led them to standing on a large rock that is in the middle of a massive waterfall. The riddle is musical in nature, and the main characters are slowly learning that if they move these rocks that are blocking these holes, it finds out that the large rock they are standing on is basically a giant flute.
Meanwhile, the show then cuts to their friend who is a musician by nature I believe he is also another mouse, and he is currently being attacked by a spider and lamenting that musicians get no respect.
Edit:
Unfortunately it is not:
Capitol Critters
Country Mouse & City Mouse
Fevel's American Tales
Flutemaster
Redwall