Really good tip when mixing, using key mapping

I made this video myself. not sure if this breaks the rules of the site or not? if so I apologise and will remove it.br
its something I came across myself and use it during every project.br
I have a bunch of useful tips on my channel. feel free Phil and sonic academy team if you want to re use my ideas in your videos on here :)br
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https://youtu.be/Jf9VOpN1dwsbr
if link doesn’t work:br