- Allen Organ Company
- Builder of church and theater organs.
- E-MU Systems
- Designs, manufactures and markets audio/MIDI interfaces, software instruments, USB/MIDI controllers and powered reference monitors.
- Kurzweil Music Systems
- Manufactures keyboards and rack modules, digital pianos, signal processors and studio monitors.
- Novation
- Manufacturer of premium midi controllers, synths and automaps.
- PianoDisc
- Manufacturers of player piano systems.
- Roland Corporation U.S.
- Manufactures multi-effects, rhythm machines, personal digital studios and other easy-to-use instruments for musicians of all types.
- Steinway & Sons
- Maker of the Steinway piano.
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