FR S1 4.0 : Route output audio track to a bus track

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Route output audio track to a bus track and for another audio track choose the bus as an audio input.
I use this method a lot to record an audio track with an attached plugin. This allows me to avoid loading my project with guitar amp simulation plugins for example and keep the best sound on this audio track. It's a way of working that I've had for years and I can not do without!