The API has some excellent stuff regarding audio segmentation. It represents any track as a list of ~2,000 segments. Each segment has energy in 12 chromatic bins measured, too. There's also information on beat times, and a Machine-Learning-based estimate of verse/chorus/solo and even more great stuff like that.
Full on auto-transcription like you hint at is a hard AI problem, like speech recognition, which will never by fully solved (according to me), but I, for one, would LOVE to see a musical editor enhanced by EchoNest metadata. One of these days, i'll add to to Audacity hahaha.
BTW, if you are in Boston area, come to the Music-Tech meetup. It's a "gem" and I'll be happy to intro you to the EN API (I worked there 6 years ago as a consultant).
Full on auto-transcription like you hint at is a hard AI problem, like speech recognition, which will never by fully solved (according to me), but I, for one, would LOVE to see a musical editor enhanced by EchoNest metadata. One of these days, i'll add to to Audacity hahaha.
BTW, if you are in Boston area, come to the Music-Tech meetup. It's a "gem" and I'll be happy to intro you to the EN API (I worked there 6 years ago as a consultant).