Earlier this month new music surfaced from Yasiin Bey (f.k.a. Mos Def) under the mysterious new moniker Dec. 99th. The track, titled “Dec. 99th – N.A.W.,” was produced by Bey’s A Country Called Earth co-founder Ferrari Sheppard and recorded over the course of a single day at D Planet Studios in Cape Town.

Dplanet is actually Human Waste of the Cape Town rap outfit DOOKOOM. In an email to Okayafrica, the Cape Town-based producer, who mixed and recorded the song, explained he was put in touch with Bey by a mutual friend who’s part of the same Muslim community as Bey in Cape Town. Sheppard contacted him a few days later to set up a recording session. “Yasiin is an artist who is never afraid to speak his mind, or to keep pushing his art” Dplanet said to us at the time. “When you meet him, he’s so humble it’s hard to remember that he’s a musical and cultural icon of our time. The fact that he has shunned the corporate music and film industries and is living in Cape Town, working with unknown artists and producers, is testimony to his dedication to his art.”

Recording live from D Planet Studios in Cape Town once again, Bey and Sheppard returned over the weekend with more new music as Dec. 99th. This one’s called “Tall Sleeves,” and it’s on the whimsical side.

No word on whether the two Dec. 99th tracks are part of a larger project or where they fit in the grand scheme of Bey’s final album plans.

Listen above.