Say I have a library of songs (lets say around 1000 songs), and the associated metadata. What would be the best way to get audio summaries for each song? I'm looking for a way that does not create a huge amount of requests, does not require upload of every song to echonest and can provide me with audio summary data for each song in a user's library (if it has audio summary data on echonest, that is) so I can do programmatic recommendation utilizing this data (I'm trying to put together a recommendation app).
I'm using jEN library.