Methods and systems for assisting tonally-challenged singers. A microphone can be integrated with a sound reinforcement system used in a live performance. The microphone, which can transduce the performer's voice, can serve multiple purposes such as, for example, to feed input to the natural ear and to the sound reinforcement system. The processed sound of the performer's voice (with fundamental frequencies emphasized) can be mixed into the signal fed to a stage “monitor” speaker facing the performer or a headset worn by the performer.