He has also played with other bands (and artists) including, but not limited to, Zymosis, The Makers, Luigi & the Wiseguys, Danny Russo Blues Band (Muddy Waters, Willie Dixon, Victoria Spivey, Spivey Records), Remod (with Richie Ramone), Jeff Salen (Tuff Darts, Sparks (band)), Tiger Beats, Tina Peel, Alan Merrill author of the song "I Love Rock 'n' Roll", Joey Ramone, Saturday Night and Sunday Morning.

Hall also studied bass privately at Berklee with Richard Appleman (chairman) and Steve Swallow (Gary Burton Band with Pat Metheny, John Scofield Trio).

Hall started playing with many Punk Rock bands which eventually led him joining Birdland with Lester Bangs.

However, after leaving Birdland to focus on his studies, Hall forged on and continued playing the circuit with other well known punk bands in the New York City area.

Hall co-wrote the song entitled "I Won't Be Your Victim" that eventually was picked as a single, and for which a video was shot.

Seeing the limitations of individual artistic development in The Rattlers, Hall decided to leave the group to concentrate on his songwriting.

Since its inception over the years however, it has culminated into Hall's first solo CD entitled Walter MIDI Group "AND THEN YOU WOKE UP!"

Players on that CD included, Clem Burke of Blondie band, Elliot Easton formally of The Cars, C.J.