Pass audio from interface to HELIO [FR]

[ghost]

there are enough tools in plugin form to record, edit, sequence and reproduce audio.

all that's actually needed is a pipeline to the interface inputs and for that to be available for plugs.

with that one thing -that needs no further development from helio-, any necessary audio segment of the composition process (guides, textures, analog inst runs etc) can be covered.

i'm writing this because the rewards from that single change can be enormous and it could reposition helio much deeper in a lot of people's process (including mine)