Music by Kevin MacLeod. Released into the public domain (CC Zero). Download link: http://freepd.com/Unclassified/Sonatina

MacLeod's description:

Genre: Classical
Length: 1:18
Instruments: Piano, Violin
Tempo: 75

While not quite a sonatina - it is closer than anything else. Forte violin with nice double stops.
ISRC: US-UAN-11-00066
Dark, Mysterious, Somber 2007