You can equalize the microphone and voicetron in the mixer on two separate channels!
Try this connection:
• Aux send (mixer) -> Micro 1 (Audya);
• Output 3/4 (Audya) -> mixer channel (Voicetron can be controlled on this channel)
• in the microphone channel in the mixer, "opens" the signal in the aux. This will be the amount of signal you will send from the mixer to Audya to activate Voicetron.
In this way, ALL members of a band can enjoy voicetron.