WMD Performance MixerThis is an expander module that adds a mute switch and individual aux CV controls to the (it does not work with the expander alone).
In addition to channels 1 to 8, you can mute Aux Sends 1 and 2, and 9 and 10 channels added by PM Channels Expander.Combo buttonBy holding down and pressing multiple mute buttons, you can switch their mute status as soon as you release the combo button, which is useful when you want to control the mute of multiple channels simultaneously.
There is also a jack to control the aux send amount of the first 4 channels with voltage.
Connection to Performance Mixer (power cable is not connected in the image)