Automatic Microphone Mixing provides automated level control of multiple microphone channels. It is designed for use in multichannel speech applications such as conferences, panel discussions, theatre or broadcast.

The AMM’s in SQ+ use the D-Classic gain sharing algorithm to increase the level of active channels whilst simultaneously decreasing the levels of any other assigned channels. Priority levels can be set to prioritise certain AMM slots over others.

SQ+ features 2x DEEP AMM’s with up to 24 channels each, these can be combined for use as a single 48 channel AMM and use a gain stage embedded in each input channel, so no latency is added when in use.

ⓘ AMM is not intended for use with instruments or signal sources other than speech.

AMM Input Assign

Any mono input channel can be assigned to an AMM. Due to AMM being embedded directly in the channel (post-delay/pre-fader), PFL can be affected by the changes in level. Therefore, it is best practice to set up channels before they are added to an AMM.

To assign input channels, press the ‘UTILITY’ screen key, then touch the ‘AMM’ tab followed by the ‘Input Assign’ tab.

The top part of the screen shows the available input channels and at the bottom are available AMM slots.

Select either ‘2’ (2 x 24 channel) or ‘1’ (1 x 48 channel) AMM using the ‘Number of AMMs’ toggle switch at the top right.

Assigning/unassigning channels –

• If using 2 AMM’s, use the 'AMM 1' and 'AMM 2' selection buttons to choose which AMM to display.
• Use the channel number tabs at the top to view all input channels.
• Touch and drag left or right in the bottom section to show all AMM slots.
• Touch and drag input channels from the top to AMM slots at the bottom to assign a channel.

ⓘ It is only possible to use the AMM with mono input channels, so stereo channels are greyed out and cannot be selected. Any input channels assigned to an AMM will be automatically unassigned if switched to stereo.

ⓘ Input channels can be freely assigned to any AMM slot, they do not need to be assigned sequentially.

ⓘ Dropping channels into a slot that already has a channel assigned, automatically unassigns the previously assigned channel.

• Touch and drag channels from assigned slots back to the top to unassign.
• Touch the ‘Clear’ button to clear all channels from the selected AMM.

AMM Overview

Press the ‘UTILITY’ screen key, then touch the ‘AMM’ tab followed by the ‘Overview’ tab.

The top part of the screen displays an overview of all AMM slots, with the metering showing gain being assigned/shared between channels and indication of whether channels have AMM switched on.

• Touch an AMM ‘In/Out’ button to switch all AMM channels in or out.

ⓘ If a channel has AMM switched on and is assigned to an active AMM, this is indicated near the top of the channel in the ‘PROCESSING’ screen with a small AMM icon.

• Touch a block of 8 AMM channels at the top to display these in the bottom half of the screen.
• Touch a slot ‘On/Off’ button to add or remove the assigned channel from the AMM. Channels have AMM automatically set to ‘On’ when they are assigned.
• Touch a slot fader and adjust using the touchscreen rotary to increase or decrease gain, and therefore slot priority in the AMM gain sharing calculation.

Priority level = -15 to +15

AMM Setup

Press the ‘UTILITY’ screen key, then touch the ‘AMM’ tab followed by the ‘Setup’ tab.

Like the ‘Overview’ screen, this displays an overview of all AMM slots, with gain metering and indication of whether or not channels have AMM switched on.

• Touch an AMM ‘In/Out’ button to switch all AMM channels in or out.
• Touch the gobal Follow Fader ‘On’ button to choose whether the channel contribution to side chain is affected by channel fader position.
• Touch High Pass Filter or Low Pass Filter frequency values and adjust using the touchscreen rotary to filter unwanted frequencies from the side chain.

HPF = 20Hz to 5kHz

LPF = 120Hz to 20kHz

ⓘ The AMM side chain to calculate channel source level is fed from the channel at the post-HPF point, and channel AMM gain adjustment is applied at the post-delay point.