Support for Audio while viewing Frames in RV

We currently maintain a custom field with a path to the latest audio for each shot.  This information is used to generate quicktimes with audio to be uploaded as Versions for review.

When viewing these in RV the audio obviously plays with the quicktimes, but if the media is switched to frames, we lose audio.

We would love some way to pipe the audio into the review within screening room.  Easiest obviously would be if that audio path field was just passed along in the shotgun_config.mu and screening room used it as a layer, but if this was achieved by a process that took a playlist entity and produced a session file, that would work as well.