1) According to hoyle 2) According to the law 3) By law 4) Conforming to the law 5) De jure 6) In a legal manner 7) Justifiably 8) Lawfully 9) Legitimately 10) Not contrary to law 11) Officially 12) One way to be bound 13) Properly 14) Reasonably 15) Rightfully 16) Under sanction 17) Wrongfully 1) Bylaw 2) Fairly 3) Wrongfully 
Client/server media players are built with architecture that separates sound engine part from user interface and thus makes it possible to control sound playback remotely from other computer or device. ...
• (adv.) In a legal manner.
Le'gal·ly adverb In a legal manner. 
[adv] - by law 2. [adv] - in a legal manner
legally In a legal manner; according to law, lawfully. Also, in a legal sense; from the point of view of law.
de jure adverb by law; conforming to the law; `we are lawfully wedded now`