You'll never hear Black Star cause the program director is mostly deaf

from Yelawolf – Radio Lyrics on Rap Genius

Nice word play here with the mostly deaf and Mos Def (From Black Star).

Black Star was a duo made by Mos Def and Talib Kweli, they are known for the high rap skills, flow and for being woderful lyricists.
Yela is telling here, that you’ll never hear a Black Star song on the radio today, because the people who run the stations don’t think it will bring the audience, because today, mostly on the songs on the radio are pop with catchy beats, hooks, and poor lyricaly to the people understand easier.

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