Hi,
I became aware of the import_from_track_to_buffer() a few days ago (when reviewing the Reaper update features).
It's an interesting and unexpected feature.
It would be nice to have the reciprocal function:
an import_from_track_to_buffer().
This would make offline processing possible with JSFX.
I think of effects/processings such as "backward reverb" and all sorts of granular/deconstructive/reconstrutive effects
Maybe a more specific kind of jsfx would suit offline processing.
JSFX with a sort of @buffer section