Audio playback management of multiple concurrent connections

A 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;
• and
• at least one non-transitory computer-readable medium comprising program instructions that are executable by the at least one processor such that the portable playback device is configured to:
• establish 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;
• receive, from the second source via second network interface, a first audio stream;
• assign, via playback software, the first audio stream as a now playing owner;
• while the first audio stream is assigned as the now playing owner, play back the first audio stream via the playback software and the at least one audio transducer;
• during playback of the first audio stream, receive, via a control interface, an input representing a volume adjustment command;
• based on receipt of the input representing the volume adjustment command, (i) cause, via the playback software, a network interface manager of the second network interface to set a volume level associated with the second network interface according to the volume adjustment command and (ii) setting, via the playback software, a local volume level according to the volume adjustment command;
• and
• based on setting the local volume level according to the volume adjustment command, send, via the first network interface over the first network to one or more control devices, data representing a volume change event, wherein the volume change event causes the one or more control devices to update respective control interfaces to indicate an adjusted volume level.

At least one non-transitory computer-readable medium comprising program instructions that are executable by at least one processor such that a portable playback device is configured to:

• establish concurrent connections to (i) a first source over a first network via a first network interface comprising at least one first antenna and (ii) a second source over a second network via a second network interface comprising at least one second antenna;
• receive, from the second source via second network interface, a first audio stream;
• assign, via playback software, the first audio stream as a now playing owner;
• while the first audio stream is assigned as the now playing owner, play back the first audio stream via the playback software and at least one transducer;
• during playback of the first audio stream, receive, via a control interface, an input representing a volume adjustment command;
• based on receipt of the input representing the volume adjustment command, (i) cause, via the playback software, a network interface manager of the second network interface to set a volume level associated with the second network interface according to the volume adjustment command and (ii) setting, via the playback software, a local volume level according to the volume adjustment command;
• and
• based on setting the local volume level according to the volume adjustment command, send, via the first network interface over the first network to one or more control devices, data representing a volume change event, wherein the volume change event causes the one or more control devices to update respective control interfaces to indicate an adjusted volume level.