Greg Wells states that he likes while tracking to try to use plugins to balance the song as it's being made, so it can lead him to what needs to be done next in the tracking phase.
I'll do this from time to time as well, but for me at least...I don't want to box in the artist too much and make it dependent on those plugins. They're just a tool to go in future for a second and see what this will sound like when it's finished real quick and then come back to earth and have an idea of where it should go.
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