Controls

Channel

The input channel numbers.

Open

Lit (green) when a channel is sharing the available input gain.

Channel Gain

Meter that shows the gain currently being applied to the input signal.

When the Open LED is lit green, the meter shows a value of 0dB or above; when the Open LED is unlit, the meter shows the value specified for either Rest Gain or the Depth (available via the Gain Share Setup button).

Output Mix

Specifies the weight of a particular input, so it will be louder in the output mix.

Normally, these controls are left set to 0 dB. Since these controls affect the signals after the gain sharing circuitry, they do not affect how much of the shared gain the input receives. For example, an input could be set 6 dB above the other inputs on the input level controls, but turned down 6 dB on the output mix.

Note: Do not try to kill an individual input using these controls, since the input will still be included in the gain sharing, even though it will not be part of the output mix.

Out

Specifies the amount of amplification or attenuation to be applied to the mix output.

Gain Share Setup

Depth

The level of attenuation to apply to the closed channels when one or more channels are open.

When someone speaks into a microphone, that input is set to full gain, while the other inputs are set to the lower Depth gain setting.

Rest Gain

The level of attenuation to apply to all channels when no channel is open.

Tip: We suggest using -12 dB as a starting Rest Gain setting. If -3 dB were selected, then there would be little advantage of the automatic mixer over a plain mixer. If -24 dB were selected, then background noise would cause a greater modulation of the gain changes.

Time Const

The sample rate for the gain sharing.

Tip: We suggest starting with a sample rate of between 30 and 50ms. The most suitable setting will be dependent on many environmental factors, and should be determined in the finished system.