Lock Screen Media Playback Control

A tangible, non-transitory, computer-readable medium storing instructions that, when executed by one or more processors, cause a mobile device to perform functions comprising:

• while the mobile device is in an unlocked state:
• displaying a media application;
• receiving, via the media application, input data representing a command to play back one or more audio tracks on one or more playback devices;
• and
• sending, via a wireless network interface of the mobile device, instructions to cause the one or more playback devices to play back the one or more audio tracks;
• entering a locked state on the mobile device;
• and
• while the mobile device is in the locked state:
• selecting, independent of user input, the one or more playback devices from among the multiple playback devices connected to a local area network;
• displaying a lock screen control for the one or more selected playback devices, the lock screen control comprising (i) a playback status control displaying metadata of a particular audio track playing back on the one or more selected playback devices and (ii) one or more transport controls to control playback by the one or more selected playback devices;
• receiving input data representing a command to adjust playback volume on one or more selected playback devices;
• and
• sending, via the wireless network interface of the mobile device, instructions to cause the one or more selected playback devices to adjust playback volume according to the command.

A mobile device comprising:

• a touch-screen display;
• one or more processors;
• data storage storing instructions that when executed by the one or more processors cause the mobile device to perform functions comprising:
• while the mobile device is in an unlocked state:
• displaying, via the touch-screen display, a media application;
• receiving, via the media application, input data representing a command to play back one or more audio tracks on one or more playback devices;
• and
• sending, via a wireless network interface of the mobile device, instructions to cause the one or more playback devices to play back the one or more audio tracks;
• entering a locked state on the mobile device;
• and
• while the mobile device is in the locked state:
• selecting, independent of user input, the one or more playback devices from among the multiple playback devices connected to a local area network;
• displaying, via the touch-screen display, a lock screen control for the one or more selected playback devices, the lock screen control comprising (i) a playback status control displaying metadata of a particular audio track playing back on the one or more selected playback devices and (ii) one or more transport controls to control playback by the one or more selected playback devices;
• receiving input data representing a command to adjust playback volume on one or more selected playback devices;
• and
• sending, via the wireless network interface of the mobile device, instructions to cause the one or more selected playback devices to adjust playback volume according to the command.