Most GV audio chips (post-2018) comply with USB Audio Class 1.0 or 2.0. This means:
You usually do not need a custom driver unless advanced features (multi-channel, hardware mixing) are missing. gv audio driver
Cause: Sample rate mismatch. The driver is set to 48kHz, but your software is using 44.1kHz. Most GV audio chips (post-2018) comply with USB
Fix:
sudo modprobe snd_aloop
# Rename the PCM device
echo "GV Audio Driver" > /proc/asound/card1/id
Then use aplay -D hw:GV to send audio to it. You usually do not need a custom driver
Without this driver, your expensive SDI capture card or I/O device is essentially a brick.
Once installed, the "GV Audio" device is treated as a microphone.