Wiktionary
carry a tune
vb. (context idiomatic English) To produce music, especially to sing, with accurate pitch.
Usage examples of "carry a tune".
Lem can't carry a tune, and our longbow lad only knows marcher ballads, every one of them a hundred verses long.
The piano playing was better than her voice, but her voice wasn't awful, simply adequate, if a little thin, and she could certainly carry a tune.
I couldn't carry a tune if I had two others to hold up the ends of it".
Though he could wield great magicks, he couldnt carry a tune in a bucket.
And the way you hummed `Red River Valley' today while we marched, same way Sola used to hum `Greensleeves,' even if you do carry a tune even worse than you did before.