CQ How To - Use DCA's
DCA's (Digitally Controlled Amplifiers) are control groups in the CQ which allow the level and mutes of multiple channels to be controlled using a single fader and mute button.
More information on the Allen & Heath CQ compact digital mixer range -
https://www.allen-heath.com/cq
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https://www.allen-heath.com/resources/
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https://support.allen-heath.com