Means by which musicians can part of the rest of the sound mix (including voices) and how their instruments sound after being amplified. Also enables actors on stage to hear musicians or effects when they cannot hear the output of the auditorium sound system.
The process of returning the amplified sound to the stage so that the performers can hear themselves. Rarely used in straight plays: essential for musical work of all kinds. Special foldback monitors are needed which much less likely to feed into the mics to produce feedback (qv).
A feed sent back to the artist via loudspeakers or headphones to enable them to monitor the sounds they are producing.