History:

The V.O.S. Trio (also known as The Valley Of Sound Trio and just The Valley Of Sound) were a lounge band based somewhere in the Lehigh Valley in Pennsylvania. It is likely they were from Bethlehem or Allentown. The original lineup featured bandleader and keyboardist Gare Rex, guitarist Rich Brensinger, and drummer Bill Andrews. This lineup played frequently at resorts in the Pocono region. 

The trio loved to play a fictionalized version of themselves as greasers from the 50's. This led to them playing a long "Rock and Roll Medley" that led them to regional success. They were popular enough to record an album, titled "Yesterday & Today", in the early 1970's. It appears to have been recorded live or with minimal overdubs. The first side consisted of individual tracks including an instrumental intro and covers of Paul McCartney, Rare Earth, and It's A Beautiful Day. The flip side is the aforementioned rock / doo wop medley. 

The album was produced by the group but recorded and engineered by Henry Casella (also known as King Henry). Casella was a legendary local lounge musician who made dozens of recordings. It was released on Valley Of Sound Records, a subsidiary of King Henry Productions imprint. This information goes down a rabbit hole of other Easton based labels that are connected, including Trio-Tex and G-B Recordings. 

The band underwent a slight lineup change when John Burros replaced Brensinger on guitar. He also contributed percussion. The trio would go on to record "Super Lemon" which is the group's most popular album with collectors. Released in 1974, the album features all medley tracks except the first two tunes. The album is notable for the inclusion of "Soul Songs", a funk medley featuring a drum break sampled by hip hop legend Jdilla. The rest of the album is apparently uneventful. 

The band went through another lineup change in 1975. Gare remained as the only original member playing a wide assortment of keyboards including organ, synth, electric piano, piano, and synth bass. He recruited Jim Groller on drums and Mike Gabarick on guitar. The trio went into the studio for their next record. They returned with one side while opting to keep the flipside their world famous rock medley one last time. 

The resulting album was "Newborn". It is the group's most obscure work and sold terribly compared to their other two. Side A features original material by Rex for the first time. He wrote "I Look At The Sun", "While I'm Away", and "Butterfly". The group recorded a Marvin Gaye cover and a jazz standard as well. The studio tracks were cut at King Henry's studio in the Poconos and was likely released in 1976. The album is a departure musically save for the flip side. The studio numbers are synth heavy with wah wah guitar and lean into outsider rock territory.  

After this album, the trio likely called it quits. It's unclear what happened to any members of the band save for the original guitarist Brensinger. He still plays music live in Florida.