Simplify the following text for a Grade 6 native English-speaking person.
Original: His debut album , Martin Carthy , was released in 1965 , and also featured Dave Swarbrick playing fiddle on some tracks , although he was not mentioned in the album 's sleeve notes .
Simplified: His first album , Martin Carthy , was released in 1965 . It had Dave Swarbrick playing fiddle playing on some songs , although he was not named on the album cover .