User manual

4REA4 Controller Software User Guide
50
V1.30
9.11 Audio / AMM
The Automatic Mic Mixer (AMM) provides automatic level control of multiple microphones for spoken word
applications such as conferences and discussion panels involving several participants each with their own
mic around a table. This improves intelligibility and can reduce the risk of feedback by reducing the levels of
mics which are not being spoken into. Once set, the AMM needs little or no change at all whilst still allowing
the engineer to maintain absolute control of the mix.
 The AMM is intended for speech applications, not music.
Main View
The AMM uses a 'constant gain sharing' algorithm to dynamically adjust the gain for each mic proportional to
its input level. Louder signals will receive more gain in the mix.
Priority Level - For each channel you can set a priority 'level' which will offset the amount of gain going into
the mix calculation and therefore give a higher or lower artificial gain to that channel. This is a variable slider
with a range from -15dB (low priority) through 0dB (no offset) in the middle to +15dB (high priority) at the top.
ON - When switched to 'ON' the AMM sets the channel fader to '0' and then takes automatic control using its
own gain element just after each fader.