AeroPlay is a reimplementation of the AirTunes protocol (also known as AirPlay®) for Android. It allows the device to appear as an AirPlay® speaker (receiver) on your network. Compatible devices can then play (send) to the device, which will relay that sound to its speaker or headphones, as would any other audio application.

The app can also record incoming audio as a file, as an .M4A file (AAC and HE-AAC+ formats supported), or a lossless FLAC file. A variety of preset bitrates are supported.

You can also apply real time audio effects, such as equalisation, reverb, gain and bass boost. Availability is limited to the effects built in to your device.

Finally, if the sending device advertises the ability to be remotely controlled, it will act as that device's controller, allowing it to play, pause, fast-forward, rewind, and change the device's volume. Note that this is subject to sender's implementation of this service, which is idiosyncratic at best.

KNOWN ISSUES:
The app was written to be compatible with the protocol used in version 1 of AirPlay®, in particular the version used by an AirPort Express® device. Therefore it inherits the issues associated with these devices.

- As of macOS Ventura (and perhaps before), using AirPlay direct from within Safari's video element (as used by YouTube, etc) is NOT supported. I suspect this now requires AirPlay® version 2. This issue also affects Apple's AirPort Express®. For whatever strange reason, the iOS browser version does still work. The workaround is to use the app as an AirPlay® output device in the Sound Control Panel.