Piston guide key

Pitch changing means for pedal steel guitars

Playing height adjustment for keyboard percussion instruments

Polychromatic harmonica

Portable drum set

Portable drumset

Practice chanter spittle trap

Protective case for violin/viola/cello

Pythagorean fret placement

Quick pik

Rapid toner for guitars

Real drum trigger monitor and tone module

Recorder

Reeds for saxophones, clarinets and other woodwinds

Resonating means for banjos

Rhythm traps

Ribbon guitar

Rosin holder for violins

Rotary sound path selector valve with biased rotor

Rotatable fastener locking device