Soundcraft Ui24R [20/29] User guide addendum 2 for ui24r

User guide addendum 2 for Ui24R

9/ Automix

Un-scripted multi-microphone live events such as talk-shows, game-shows and discussion

boards suffer from both microphone spill and back-ground noise. With each active microphone

added to the mix, the overall sound quality deteriorates. The result is decreased intelligibility and

unpleasant comb filter effects (phase distortion). The gain of all the microphone is added together

to create a harder environment to control against feedback even when certain microphones are

not being used.

With several mics in use, an operator needs to manually adjust all the faders constantly, leaving

the microphones of talking participants open, while closing the microphones of silent participants

in order to reduce spill and background noise (using the MUTE buttons or moving the faders

quickly up and down).

Due to the reaction time of a human operator this often results in audible fade-ins of people who

start talking rather unexpectedly. Changing in fader positions can quickly lead to disturbing

changes of the total ambience/noise level in the mix.

The Ui24’s Automix Offers the Solution – by mimicking the action of a human operator: Increasing

gain for ‘talking’ mics and reducing gain for all others, but very quickly, and by keeping the

amount of total gain constant, a clean live mix can be created.

Using in the Ui24R

2 groups are available in the Ui24R for Automixing (A and B)

Each selected channel which is added to one of the available Automix Groups has a WEIGHT

control, it allows the operator to give more gain in the mix to any contributors who have weak

voices or who are too far from their microphones.

The weight control may also be used during a show to adjust the relative balance dynamically.

The RESPONSE TIME control fader (global for both groups) sets the speed of operation of the

Automix algorithm in a way similar to the attack time control of a dynamics unit.