Geoffrey Castle featured on violin in Johnny Bacolas', "The Sin" featuring Len Hotrum on vocals. 

Geoffrey Castle featured on violin in The Rumba Kings' remake of "To Agalma," featuring Sofi Alexandrou on vocals. 

Geoffrey Castle's official website
Geoffrey Castle's credits onAllmusic

Geoffrey Castle featured on violin in Producer, Johnny Bacolas' remake of "To Agalma," featuring Giorgos Sarris on vocals. 

Geoffrey Castle, born Jeffrey Sick, began playing violin at age nine in New York City. He studied privately and performed in school orchestras, all-city and all-state orchestras, and in his high school marching band in Alexandria, Virginia. He began solo performances on the electric violin at the age of seventeen.  Castle earned money as a street musician while attending Columbia University where he received a Cum Laude degree in English and Comparative Literature.

Castle has released seven albums on his own Twisted Fiddle Music label and four albums as a member of Children Of The Revolution.  As a session player he has contributed to many projects. In 1998 he played on Jeanette Alexander's first album, Still Point.

For several years Castle fronted the band Guarneri Underground. He co-produced a self-titled album for this group in 2000.
Castle has played as part of a variety of live productions, including the Broadway production of M. Butterfly to sharing the stage with members of YES, Heart and Queen, as well as regular local performances in Kirkland.  Additionally, Castle has performed with visiting musicians from several countries, and since 2011 has played in concerts with Lucy Wu, Jinghu player and singer from the Beijing Opera, in an "East Meets West: Violin Meets Jinghu" collaboration.

Castle organizes a series of "Celtic Christmas" and "St. Patrick's Day Celebration" concerts in theaters throughout the Northwest US. These performances are well attended and often sold out.

Geoffrey Castle's music, both as a band leader and a solo artist, has been featured on radio and TV across the US, and his violin work has been included in a number of movie and TV soundtracks.

Castle performs on such songs by The Rumba Kings as, "The Sin," "Gypsy's Tear," "Dance with me," and Producer, Johnny Bacolas' remake of the Greek classic, "To Agalma."