Partner with headphone manufacturers to add headphone controls to Deezer

1. 

   Ability to change headphones audio codec
2. Display of headphone battery percentage
3. Detect headphones code and have Deezer match that codec (eg if headphones use AAC, stream in AAC)
4. Control noise cancelling mode from within Deezer

Basically offer the same controls the headphone maker has in their app.

Then the headphone makers could put a “Deezer-compatible” logo on their packaging, and you could partner for free trials of Deezer etc