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Update BUILDFORAP2.md

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Mike Brady
2021-06-23 20:06:58 +01:00
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@@ -65,10 +65,7 @@ Download, install and start/enable `nqptp` from [here](https://github.com/mikebr
***Note:*** At present, Shairport Sync expects the `nqptp` repository folder to be in the same directory as the `shairport-sync` repository folder, as it will look for a header file at `../nqptp/nqptp-shm-structures.h`.
The `nqptp` service monitors PTP clocks. It provides a POSIX Shared Memory Interface (SMI) at `/nqptp`. A shared
pthread mutex is contained within the interface, and to use it you need write access. This is available
to the `root` user and also to members of the unix group `nqptp`, which is created by the `nqptp` installer.
You should include the relevant users in the `nqptp` group -- including the `shairport-sync` user if you are using the standard Shairport Sync installer.
pthread mutex is contained within the interface, and to use it you need write access.
Next, download Shairport Sync, configure it, compile and install it:
```
@@ -118,11 +115,11 @@ You may wish to run Shairport Sync from the command line (but remember to ensure
```
$ shairport-sync -vu --statistics
```
The user doesn't need to be privileged, but should be a member of the `nqptp` group for access to the `nqptp` service, and it should also be a member of the `audio` group for access to the `alsa` subsystem.
The user doesn't need to be privileged, but should be a member of the `audio` group for access to the `alsa` subsystem.
### Using Shairport Sync ###
The Shairport Sync AirPlay service should appear on the network with a service name made from the machine's hostname with the first letter capitalised, e.g. hostname `ubuntu` gives a service name `Ububntu`. You can change the service name in the configuration file.
The Shairport Sync AirPlay service should appear on the network with a service name made from the machine's hostname with the first letter capitalised, e.g. hostname `ubuntu` gives a service name `Ubuntu`. You can change the service name in the configuration file.
Connect and enjoy...