Basic Betacam Camerawork, 3rd Edition

Using an audio mixer

The main reasons for using a separate mixer are that more microphones can be used and the operator will have better control of the balanced output between the microphones along with greater control of each microphone.

Audio mixer

Small portable audio mixers usually have the following facilities:

•	powered by internal batteries or external DC supply;
•	PPM meters indicating peaks of programme sound;
•	multiple microphone inputs (4–6 channels);
•	switched power supply (phantom 48 V/off/T) for each microphone input;
•	coarse gain control for each channel (usually a switch selecting 0 dB (line), –10 dB; –40 dB; –60 dB; –80 dB);
•	high-pass filter for each channel consisting of a three-position switch enabling low ...