I just did a test and engaged the unit with a CD. It was only in the very extreme sensitivity and threshold settings where I was hearing the same noise (crackle) that I noticed on records. This crackle that I'm hearing is music being removed. When I back off on those settings, that crackle goes away. So I guess the unit is working properly.
I guess I still have to learn to properly fine-tune the unit to balance the noise it's removing without impacting the music.
I guess I still have to learn to properly fine-tune the unit to balance the noise it's removing without impacting the music.