Vince Guaraldi

According to the Wikipedia article on Vince Guaraldi's "Oh Good Grief!" album, the Baldwin Electric Harpsichord is credited with providing the defining sound of the album, contributing to its distinctive modern texture.

Vince Guaraldi is best known for playing a black Steinway & Sons Grand Piano, as detailed by Kewin Apo in the Scribd article "Vince Guaraldi at the Piano."

According to Kewin Apo in "Vince Guaraldi at the Piano" on Scribd, Vince Guaraldi used a Fender Rhodes electric piano on several Peanuts albums, including the Thanksgiving album, and also played it on the 2004 compilation album "Oaxaca".

According to Kewin Apo's book Vince Guaraldi at the Piano on Scribd, Vince Guaraldi purchased a Moog Synthesizer in San Francisco, which he utilized on several Peanuts albums, including "Oh, Good Grief!" as well as in some of his later works.

According to Kewin Apo's book Vince Guaraldi at the Piano, available on Scribd, Vince Guaraldi not only used a Moog synthesizer but also had an interest in the Hammond B-3 organ, which is described as being about the size of a small upright piano.