We have another question:
If we make a search to 7digital via Echonest, we dont find the same results as if we make a call to 7d API directly. For example, we dont have the ID of the track to call the preview, or we dont have the info of tracks that we can find if we call 7d API directly, but dont find if the call is with echonest.
Also, a call to 7digital via Echonest API is not necessary to put the 7d API key in the call, and only need the Echonest key.
The question is: there is a way to call the 7digital services via Echonest API and return the same results? This is an important point, becouse also the return between both APIs is different (Echonest return a jSON and 7d a XML format) and we have to make a decision.
Thanks in advance ;)