Music or noise?  It's in the ear of the beholder.

I have demonstrated my grind organ in very quiet rooms where I felt
the music was too loud for the situation, or where the sound might
carry into an adjacent room, so I threw a blanket over the organ.
This reduced the volume.  A blanket over a band organ might help
a bit.  A Wurlitzer 125 is fun, but when close up, it's sound can
be irritating after a few minutes.

I might comment that years ago my Wurlitzer 145 band organ (it's wood
trumpets are not as harsh a sound as the model 125 brass trumpets) was
welcome at Bayfest, a local street festival.  I was placed at the far
end of the festival area; it's unique music attracted people to the
back of the area where several food booths were located.  One lady
vendor was a fussbudget, and would repeatedly ask, "Ain't you ever
going to turn that d----d noise off?"

If I shut it down the three other food vendors would demand, "Please
turn it back on!  It attracts customers!"  For every person who
complained there were many that enjoyed.

The placement of the organ may also be a factor.  At a rally a few
years ago a brass trumpet organ was facing the large open back door of
a kitchen, and those brass trumpets all day long irritated the kitchen
workers to no end.  One of them returned after dark to sabotage by
cutting the electric wiring on the bottom of the organ trailer.  Next
day, after rewiring, the organ owner repositioned the organ to face the
street where passers-by could hear it and then pass on by.   No more
complaints.

Dale Gunnar
Corpus Christi, Texas