Brad, any noise gate should do the job for you. You may have to play around with the settings but is should work. If you google/bing free vst noise gate you will find a lot of them. I have no experience with them but I have used noise gates in Amplitude when using distortion. Some of them produce a loud hiss when you are not playing.

I agree that Audacity noise removal is one of the best!

Good luck


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