This is weird.
Some may see that in the Computers forum I posted a threads asking about producing 4-channel surround sound with some sort of virtual sound card.
 
I found something called "Voicemeeter" that works great for this.
 
However, since having installed it, now whenever or WHAT ever I try to record in CbB comes out as just loud white noise.
I can do input monitoring just fine, with effects and everything, and it even properly draws the waveform while recording - but as soon as I stop recording (and also toggle all FX off, that has to be set), all I get is reeeeally loud white noise.
 
Anyone experienced this? Is there a root cause and possibly a worthy fix?

This might help
https://forum.vb-audio.com/viewtopic.php?t=451
 
Could be a conflict between your soundcard and Voicemeeter running at the same time.
You may have to kill it in task manager before opening sonar.
I had similar problem years ago with ASIO4ALL when I installed a new soundcard and its drivers.
I had to uninstall ASIO4ALL in order to move forward with my work.