Not long ago, it was called the Sixth Sense. David is calling it "channels". The Grid doesn't need a "grid-er" so I assume channeling doesn't need a channeler. Hince, one can channel art, etc. It is still a means or conduit of perception.
IMHO, one must first percieve, then respond. Too often, it happens so fast one is left with a feeling of only one event, rather than two.
Most folks who do this, say; "I don't really know,,, it just comes to me."
So, I will ask; Does the musician request a song, or does it just come of it's own? And,,, does the ego furnish or enfluence the lyrics?
Melodic Cheers, Deano