Audio Playback Management of Multiple Concurrent Connections

A system comprising a portable playback device, the portable playback device comprising:

• at least one audio transducer;
• at least one battery;
• a first network interface comprising at least one first antenna;
• a second network interface comprising at least one second antenna;
• at least one processor;
• data storage;
• and
• program instructions stored on the data storage that, when executed by the at least first processor, cause the portable playback device to perform functions comprising:
• establishing concurrent connections to (i) a first source over a first network via the first network interface and (ii) a second source over a second network via the second network interface;
• receiving, from the first source via the first network interface, a first audio stream;
• assigning the first audio stream as a now playing owner;
• while the first audio stream is assigned as the now playing owner, playing back the first audio stream via the at least one transducer;
• while the first audio stream is assigned as the now playing owner, receiving, from the second source via the second network interface, a second audio stream;
• determining that the second audio stream includes audio content for playback, wherein determining that the second audio stream includes audio content for playback comprises:
• monitoring, via a silence detector, the second audio stream;
• and
• while monitoring the second audio stream, determining that the second audio stream includes at least a threshold period of non-silence;
• based on determining that the second audio stream includes audio content for playback, assigning the second audio stream as the now playing owner;
• and
• while the second audio stream is assigned as the now playing owner, playing back the second audio stream via the at least one transducer.