This is "almost" exactly what I need, but I need a version modified to clamp to perfect silence, instead of just really really quiet, so that the "Detach at Silences" (a/k/a Disjoin in older versions) function will cause the quiet regions to go away.
I tried manually editing the .ny file to set the level-red variable to zero, and the result was almost perfect. When the gate closed, I got perfect silence, suitable for "Detach at Silences", but the gate opening attack then included clicks at the beginning and end of the attack window (i.e. for a 250ms attack/decay setting, two clicks, 250ms apart). The clicks proved too annoying to tolerate.
Previously, I tried the included "Gate" effect, which was a little different. This one does produce "detachable" silence, but will hold open for at least a second past the end of the desired audio, and no combination of the attack/hold/decay sliders can make the gate close any faster. I'd like to have a gate that can than open and close quickly, produce high quality output, like "Noise Gate" does, but have the option to clamp to "detachable" silence, not just _really_ quiet.
This will allow me to use the "Detach at Silences" function to quickly drop out the quiet portions below the threshold, and then I'll be slide the remaining sounds around on the timeline with minimum fuss. Which is what I really need to do for my project.
Does anyone (the author himself?) know how the "Noise Gate" plugin might be modified to accomplish this?