I updated my Multiriff how to post above:

EDIT: I asked for a padding option for the multiriifs so it will add blank audio from bar -1 to the start of the riff,
so for now when you import the riff set it to start on the bar where the riff starts.
And also I noticed the drag n drop Audio Import is working BUT it only shows up to bar 6 in the Audio Edit window so that is useless at the moment, and the floating Audio Edit doesn't support drag n drop at the moment.
And the midi drag n drop is not working in the piano roll yet:

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BB-Midi-Drop.png (21.03 KB, 315 downloads)
BB-Audio-Edit-Drop.gif (322.99 KB, 310 downloads)