Up front I realize this is probably a niche request, but here goes:
First, I listen to a number of longer form audio files (radio shows, podcasts, audiobooks, mix- and sound- cloud downloads, etc) that are anywhere from 1 - 5 hours in length.
Also, I have a music library that is in excess of 30,000 conventional length mp3 songs that I am slowly listening to and rating.
In both cases, the Bookmark feature can keep track of the amount of time I've invested in each track on the Desktop, but that doesn't seem to translate to the Andoid app.
I would like to be able to create an Auto playlist that can...
a.) play a defined percentage or number of minutes of a track (25%, 30 seconds, etc) before skipping to the next track and
b.) remove from the playlist those tracks that have reached the threshold the next time I sync.