I stumbled on to this 1978 flick that starred and was written by Burt Young:
http://lcweb2.loc.gov/diglib/ihas/loc.natlib.jots.200020248/default.html
It starts off with BY doing a recording session for a film, screeching like Maynard, for no discernable reason.
He hangs with his beautiful wife and son, and then hurries off to a concert with a symphony orchestra (whose members are all dressed in white robes) where he's the soloist in some kind of Baroque/Jazz Concerto for Trumpet that features him screeching again like Maynard, for no discernable reason.
When he comes home after the concert, his wife and kid have been turned into unrecognizable toast by a fire in their house.
Next thing you know, he's a homeless, alcoholic bum, carrying around his trumpet without a case throughout the entire movie.
I thought that maybe the avocados I've been having with my salad caused some type of cinematic hallucination, but I checked the IMDB, and sure enough, this movie was released, and then went to the Meeker cited above, and found out whowas associated with it.
No musicians on the gig tonight ever heard of this flick. Please tell me that someone has seen this weirdness...