What equipment is used to adjust the levels of audio signals in a broadcast environment?

The equipment used to adjust the levels of audio signals in a broadcast environment is the audio mixer. An audio mixer allows operators to blend multiple audio sources together, enabling them to control the volume, tone, and dynamics of each input. This essential tool provides the capability to manipulate audio levels in real time, which is crucial for achieving a balanced sound mix, especially in live broadcasting scenarios.

An audio recorder primarily captures sound for later playback and does not facilitate real-time audio adjustments. An audio interface is designed to connect microphones and other audio equipment to a computer, converting analog signals into digital format, but it lacks the comprehensive mixing features of an audio mixer. An audio amplifier increases the power of the audio signal but does not provide the functionality for adjusting levels among various sources. Consequently, the audio mixer is the appropriate choice for level adjustments in a broadcast setting.