I like this app for AirPlay multi-room playback but sadly the app fails to detect Apples AirPort Express base stations that have 'audio-out' to connected speakers.
I assume this is an Apple limitation placed upon the developer, rather than it being an oversight.
It's a pity, because I have several speakers connected to two Airport Express devices and it would have been great to have grouped them together for multi-room playback.
Still there are lots of good features within this software and I will keep an eye out for future updates.
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