Fans of late jazz pianist Bill Evans will no doubt appreciate "Practice Tape No. 1" (E3), the first of a series of archival recordings, the restoration and release of which are being overseen by Evan Evans, son of the artist. Quietly released in late August, the 23-track CD comes from two tapes of Evans practicing his craft, unaccompanied in his apartment in the 1970s.

The disc includes few full works, but more riffs and shards of Evans originals along with passages of the work of other jazz composers, as well as several Bach pieces performed by the classically trained musician. Throughout the disc, Evans is faintly heard talking to an unidentified friend or associate, sometimes discussing his technique.

"My father practiced an average of eight hours a day in his later years," Evan Evans writes in the disc's liner notes. "That his music was so powerful can only be a testament to the importance of perseverance, dedication, and above all, as he and I agree, discipline."

Evan Evans tells Billboard.com that more than 20 hours of tapes were discovered in his attic, giving him a glimpse into the work of his father, one of the most revered pianists of the 20th century. Evans, himself a film composer, says that more "Practice Tapes" discs will be released in the future, although a definitive timetable has not been set.

"Practice Tapes" is the second collection of unearthed Evans material to be released by Evan through his label, E3, following the five-disc "Very Early" series of recordings of the artist between the ages of 13-26.

For more information on the "Practice Tapes" and "Very Early" recordings, visit the official Bill Evans Web site.