Mispluck

If there were any misplayed notes or misplucked strings, this listener blissfully unaware of them.

Source: wiktionary

Although Kirchofs technique is fluid, it can also become rather sloppy, riddled with far too many misplucked notes.

Source: wiktionary

Anna's repertoire of folk songs usually delights the audience and has them joining in each chorus, but tonight her voice sounds reedy and her fingers mispluck several times.

Source: wiktionary