FiFine USB Mic - MOX Works, Foot Pedal Doesn't

Hello all,

I had been using an el-cheapo Fifine USB desk mic that was getting me glowing audio reports, so I thought I'd get cute and get a "better" one of the same make, model #K688CT with a boom and a hardware foot pedal to key my one month old 8400M. The radio is flashed to the latest SmartSDR version and I am using v3.10.15 in Windows 11 Pro. The foot pedal is a cheap one as well and is the standard SPST type, "Philmore" brand, and requires a 1/4" female to RCA male jumper to connect to the PTT jack on the 8400M. Obviously the 8400M is in the same room.

I immediately discovered that while the foot pedal keys the radio, I have no power output when using my new USB mic. However, when I click the MOX button it works fine and I see the power output and audio levels I'd expect when transmitting. I also still have the stock mic connected to the 8400M and if I use the foot pedal to key the radio I get normal output with it as well.

I see some similar foot pedal comments in some postings here but not sure they are relevant to my issue. I expect I have something misconfigured. Both transmit profile and mic profile are set to "Default". This is how it was with the older USB mic but I was using MOX all the time. The foot pedal seemed like a logical progression.

This is my first FlexRadio and I'm enjoying it thoroughly. I will continue to dig for an answer but if anyone can give me a boot in the right direction I'd be grateful.

Many thanks and 73.

Scott/KC1UA
Cape Cod MA. USA