I selected Template 012 Guitar and Mic for a basic start with the two respective inputs and made no changes or added blocks, etc. Using headphones for monitoring. Guitar input works fine. But there is nothing from the mic. The mic is a Shure Beta 87A. I set the Helix Mic In 48v on. I adjusted the Mic In Gain in Global Settings but it had no effect. I also increased the Pre-amp Gain and Level but there still is no mic sound. I don't think the mic is bad and I swapped mic cables. Are there other s