Caught this one completely unexpectedly. Here's the log I wrote after getting back to the apartment. QTH for this catch was my go-to location when I'm DXing, the Wisconsin state capitol lawn. I'm amazed how faint KOA was; I didn't think anything could drown that flamethrower out!
850, KEYH - La Ranchera 85, Houston, Texas, 0203-0213. Ranchero music with one clear male voice ID between songs, wording might have varied a little, but the ID itself was plain: "La musica de mi tierra, la ranchera ocho cincuenta." The music of my land, la ranchera 85. Signal good at first, fading down to fair. Only a whisper of KOA in Denver audible beneath. SINPO 33344.