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Mike Brady
2022-05-23 11:35:47 +01:00
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Building Shairport Sync for AirPlay 2
==
* Before embarking on building Shairport Sync, you might wish to [check the features and limitations](https://github.com/mikebrady/shairport-sync/blob/development/AIRPLAY2.md) of the AirPlay 2 service it provides.
* Build instructions are different from previous versions of Shairport Sync. Please read carefully.
* Be very careful with audio systems capable of very high volume output -- the volume control in this software may not be reliable!
* For now, leave the settings in the configuration file at default except as noted below.
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* The POSIX Shared Memory Interface (SMI) Version numbers of `nqptp` and Shairport Sync must match. If they don't, you'll get a message in the logs. It means that one of the programs is out of date with respect to the other.
* Build instructions are likely to change.
Shairport Sync AirPlay 2 Limitations
==
* No AirPlay 2 service for iTunes on Windows. This is because iTunes for Windows uses an authentication system that has not deciphered.
* Remote control from other devices doesn't work well -- the protocol is not understood.
* You can not install Shairport Sync for AirPlay 2 on a Mac. This is because the Mac already uses ports 319 and 320 and so they are not available for the use of NQPTP. Without NQPTP, Shairport Sync can't provide AirPlay 2 service.
* Fedora can't be used without significant modifications. Fedora 36 does not contain a suitable AAC decoder and its sound system is based on Pipewire, which is incompatible with Shairport Sync.
Instructions
==
Overall, you'll be building and installing two programs. The first one is `nqptp` and the second one is Shairport Sync itself. Build and install `nqptp` first.