Tom's accorgan contains the following electronic sounds: traditional organ, B-3 hammond organ, piano, string orchestra, instrumental sounds (trombone, clarinet, trumpet), vibes, and string bass. Tom can also incorporate accoustic accordion with the electronic instrumentation. The accorgan has a foot pedal that allows the musician to adjust the volume of the electronic sounds, just like an organ player can. The electronic sounds are in an organ generator, and the sound is amplified though a PA system or a keyboard amplifier and powered down through the speakers. The organ generator has a Midi component that allows Tom to use an organ module that replicates a B-3 hammond organ sound. Tom can also add a Leslie speaker to provide a richer, fuller tonality, also used by B-3 hammond organ players to craft a jazzier style.
Tom plays an Elkavox, a style of electronic accordion made in Italy, and he also plays the Iorio accorgan, from a New Jersey dealer who created the name for combination accordion-organs.
From the article: