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If you mean music scales, you need to be more specific, there are all sorts of scales - A m(inor), E flat (major),D (major)...
It was a long time ago, but I believe it may be around... 104 bpm?
Trumpet, Trombone, tuba and french horn are the four major brass instruments
Tuba major scales refer to circle of fourths where G major is concert G.
That would be the trombone. The trombone has a main slide instead of valves to alter the length of tubing that the vibrating air has to travel through to change the pitch of notes. All brass instruments have tuning slides to slightly lengthen or shorten the tubing length to help tune the instrument.