Releases

Hello,

I'm using echonest's search service to get a ranked list of MusicBrainz recordings using the following URL:

http://developer.echonest.com/api/v4/song/search?api_key=&bucket=id:musicbrainz&bucket=tracks&sort=song_hotttnesss-desc

I have a few questions regarding that:

1. How do you know what's the hotness of a song? What's the criteria?

2. Which release do you show? Sometimes there are many releases in its release_group, how do you select one?

For example, for 294ecdcd-7dd3-4392-87fa-edeb1349bfd0 release_group you show the second release, but for 61180839-f4a7-407f-b86f-24c48eef4066 release_group the first release is shown in the API.

By the way, that would be nice to write somewhere in the doc that what you call "track" in echonest are actually "recordings" in MusicBrainz. It's pretty confusing because MusicBrainz also have "tracks", but those that you show are a different thing. I'm sorry if it's already documented and I didn't find it.

Thank you! Matt