South African act UMnotho calls on Mjabulisi for a punchy new record titled “U XA.” The short title reads like a code, so the song keeps its meaning close to the chest.

UMnotho has been popping up all season, and Mjabulisi arrives fresh from his own loud “OVERLOAD.” Two artists who like energy on the mic make an easy match. A cryptic title also gets people talking before they press play.

The beat probably cracks open with a hard kick and a rolling bass. Because the tempo stays quick, the groove leaves little room to sit still.

UMnotho takes the first run with a clipped, confident flow. He rides the drums tightly, so the lines land like quick jabs. A bit of swagger sneaks in whenever the beat drops out.

Mjabulisi follows with a rougher, louder tone and pushes the pace even higher. The two trade short phrases about pressure, pride and standing firm, so the mood stays tense. Short, repeated chants give the crowd something to shout back.