Systems and methods for controlling content streams

A method of outputting a content stream on a user electronic device, the user electronic device comprising a display screen, the method comprising:

• receiving a content stream comprising a plurality of tracks from a sender via a wireless communication channel;
• retrieving a user framework associated with the user electronic device, wherein the user framework defines at least one predetermined setting or instruction to be applied to the content stream;
• applying the user framework to the content stream to update the content stream;
• and
• outputting the updated content stream on the user electronic device.

A method of updating a framework for a content stream, the content stream comprising a plurality of tracks, the method comprising:

• providing a content stream as defined by a framework, wherein the framework defines at least one setting or property of the content stream;
• sending the content stream as defined by the framework from a sender to a plurality of user electronic devices;
• providing viewer engagement information from at least one of the plurality of user electronic devices to the sender, wherein said viewer engagement information comprises data defining how the content stream is being output at a given user device;
• and
• updating the framework in response to the viewer engagement information received.