Playback Queue with Software Components

A method to be performed by a playback device, the method comprising:

• receiving, via a network interface, instructions to add multiple audio tracks to a playback queue, wherein the multiple audio tracks comprise a first audio track associated with a first remote source and a second audio track associated with a second remote source;
• based on the received instructions, adding the multiple audio tracks to the playback queue;
• before playing back the first audio track, enabling a first add-on component to audio-playback software, wherein the first add-on component corresponds to the first remote source, and wherein enabling the first add-on component causes a first modification to an equalization of the playback device;
• playing back the first audio track via the audio-playback software and an audio stage with the first add-on component enabled, wherein playing back the first audio track comprises streaming, via the network interface, data representing the first audio track from the first remote source;
• before playing back the second audio track, enabling a second add-on component to the audio-playback software, wherein the second add-on component corresponds to the second remote source, wherein enabling the second add-on component causes a second modification to the equalization of the playback device, and wherein enabling the second add-on component disables the first add-on component if enabled;
• and
• playing back the second audio track via the audio-playback software and the audio stage with the second add-on component enabled, wherein playing back the second audio track comprises streaming, via the network interface, data representing the second audio track from the second remote source.

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

• receiving, via a network interface, instructions to add multiple audio tracks to a playback queue, wherein the multiple audio tracks comprise a first audio track associated with a first remote source and a second audio track associated with a second remote source;
• based on the received instructions, adding the multiple audio tracks to the playback queue;
• before playing back the first audio track, enabling a first add-on component to audio-playback software, wherein the first add-on component corresponds to the first remote source, and wherein enabling the first add-on component causes a first modification to an equalization of the playback device;
• playing back the first audio track via the audio-playback software and an audio stage with the first add-on component enabled, wherein playing back the first audio track comprises streaming, via the network interface, data representing the first audio track from the first remote source;
• before playing back the second audio track, enabling a second add-on component to the audio-playback software, wherein the second add-on component corresponds to the second remote source, wherein enabling the second add-on component causes a second modification to the equalization of the playback device, and wherein enabling the second add-on component disables the first add-on component if enabled;
• and
• playing back the second audio track via the audio-playback software and the audio stage with the second add-on component enabled, wherein playing back the second audio track comprises streaming, via the network interface, data representing the second audio track from the second remote source.