A number of rare and unreleased instrumentals by the late J Dilla will be collected together for a new release called Motor City.

Curated by Dilla's mother, Maureen “Ma Dukes” Yancey, the LP and CD releases will come in a limited edition mailing envelope with a handwritten letter from Ma Dukes to her son. The LP version also comes with a download code for a mix of the album by Dilla's close collaborator J Rocc.

You can listen to one of the compilation's track above, while it can be pre-ordered in various formats here. It's out on April 21.