PRESENTING BACKUP CONTENT

Techniques that relate to selecting content for playback are disclosed in various implementations. The techniques may include receiving, at a computing device and from a primary electronic content source, a first input signal for playback by a presentation device. The techniques may also include analyzing information that is indicative of content represented by the first input signal to determine whether the first input signal is intended for playback by the presentation device. The techniques may also include causing the presentation device to play back a second input signal from a backup electronic content source in response to determining that the first input signal is not intended for playback by the presentation device.