What is typically monitored through the cue channel of a mixer?

The cue channel of a mixer is primarily used to monitor individual input sources. This allows the operator to listen to a specific audio source, such as a microphone or an instrument, before it is sent to the master output. By using the cue channel, engineers can assess the sound quality, balance, and overall mix of that source without it being heard by the audience or in the main output. This is crucial for making adjustments on the fly, ensuring that the sound is optimal for the broadcast or recording.

In contrast, the master output refers to the overall mixed sound that is sent out, while live output and pre-recorded tracks pertain to audio that is already being heard by the audience or played back. Therefore, these do not utilize the cue channel for monitoring individual inputs, which is specifically designed for pre-listening and assessing those individual sources before they go live.