Electronic sound effects equipment for use with musical instruments, namely, electronic effects rack units in the nature of a digital sound processor comprised of guitar, bass and musical instrument effects and audio processors and electronic sound processing apparatus for use with musical instruments, namely, chorus, phaser, flanger and modulation effect rack units, analog tape delay and echo rack units, dynamic and equalization audio processors rack units, musical instrument pre-amplifiers, audio signal switch boxes, and printed instructional manuals therefor, all of the foregoing sold separately; and replacement parts for all of the foregoing sold separately; musical instrument electronic effect pedals, musical instrument sound effect pedals, and electronic foot triggered stomp boxes being electronic sound effects pedals for musical instruments, namely, electronic effects pedals, treble booster pedals, fuzz pedals, distortion pedals, overdrive pedals, chorus, phaser, flanger and modulation effect pedals, analog tape delay and echo pedals, dynamic and equalization audio processor pedals, and combinations thereof, for use with guitars, bass guitars, keyboards, and musical instruments; power supplies and switches for use with electronic effects pedals, stomp boxes, treble booster pedals, fuzz pedals, distortion pedals, overdrive pedals, and combinations thereof for use with guitars, bass guitars, keyboards, and musical instruments; electrical circuits for musical instrument electronic effect pedals, namely, volume and tone control circuits, overdrive and sustained overdrive circuits, and non-overdrive circuits, and printed instructional manuals therefor, all of the foregoing sold separately; and replacement parts for all of the foregoing sold separately