I have the FX expansion modules in my 1680, which includes a noise gate. However, you can only use the effect by inserting it in the mic line that needs the gate. Unlike other effects such as delay or reverb where you can use the effect send/return bus.
This is fine except that you can only gate one microphone at a time. I found by given that the gate is a stereo effect, I can link 2 inputs with mics in them an create a stereo channel with 1/2 or 3/4 etc... I can then apply the nose gate to the stereo linked channel. So this enables to insert the gate into 2 mic lines. However, I have not found a way to do this for multiple inputs say for live recording of 4 mics.
Looks like I would need outside pre-amps for all the mic lines, then outside gates, then input into the 1680.
Is there a way to do 3 (or more) noise gates using the built-in effect of the 1680?
Philippe H.