I'm not positive that this 78 would comprise two of those or not but here we have the early Black Vaudeville act of Billy & Mary Mack accompanied by a cornetist and pianist in 1925.
The piano player was Edgar Brown while the cornetist here is making his recording debut...Ernest "Punch" Miller.
Searching the net recently for more information on Punch Miller, I saw that there was a documentary made of him back in 1971. Surprisingly, it is available to watch here.
Billy & Mary Mack v / Punch Miller c / Edgar Brown p.
Recorded in New Orleans on January 22, 1925.