Any Xbox One user will be able to use Xbox Music without paying an additional fee, provided they have an Xbox Live Gold Account. According to Microsoft’s Director of Product Planning Albert Penello, the service will be offered free of charge to Gold users, though it will still show you ads periodically. An Xbox Music subscription on the Xbox 360 cost ten dollars a month, though it did not show you ads.
Xbox Music can be used, for free, over any computer right now by going to music.xbox.com. However, it too will present you with ads periodically. However, users can unlock unlimited ad-free music by purchasing a Music Pass. Users can also download Xbox Music apps for iOS and Android.
Source: Twitter