Jukebox doesn't let you fast-forward or cue up anywhere

I have joined Roll20 for the first time and tried out some features.  The Jukebox, however, doesn't seem to let you fast-forward or cue up at specific points in the music.  It just plays from the beginning, straight through. This was particularly stupid when I tested out a track of 10 sound-effects.  That would be a powerful feature -- if it worked.  But it just plays those 10 sound-effects in order, it won't let me cue up to the one I want and play only that.  Is there some control that I am missing?

I mentioned something about this a month or so ago.  Some of the longer sound effects (music) would be nice to be able to go to any position of the sound.  I didn't think of queueing it up, but thats a good idea.

It's a SoundCloud-based thing, though.  SoundCloud lets you do that.  They haven't ported sufficient controls from SoundCloud, maybe?