Scott — issue resolved. No more VAC overflows or underflows. The mic is muted or B1 disabled. Turns out I was using USB mode in FT8 instead of DIGU.
Cheers, VK2QV

Both VM virtual devices are configured to 48kHz. I also tried using MME, but that didn’t yield any results. I’m starting to think the onboard sound card on my PC might be the culprit. What puzzles me, though, is why the VAC values begin to rise whenever I mute or disable B1 in VM.

VM10.png
VM11 ...

Hi Scott

Thanks for the reply. I can confirm all audio properties are set to a 48kHz sample rate and 24-bit depth.

I’ve identified when VAC1 overflow and underflow values begin to rise—they occur if I mute the microphone or disable M1 while operating in FT8 mode. Otherwise, ambient room noise is ...

Hi Team

I'm fairly new to both this group and to using G2. I've been running into an issue with VAC overflow and underflow on both the input and output sides. As a result, I'm losing data packets in FT8 mode, which is impacting both transmit and receive performance.
Please see the attached image ...