diff --git a/BUILDFORAP2.md b/BUILDFORAP2.md index 71e789d8..d9e019e3 100644 --- a/BUILDFORAP2.md +++ b/BUILDFORAP2.md @@ -5,8 +5,7 @@ Build Instructions for AirPlay 2 * Be especially 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. * At the time of writing, May 2, 2021, everything is on the latest version of the software -- macOS 11.3, iOS 14.5, Raspberry Pi OS 5.10.17-v7l+ (Buster), Ubuntu 20.04 -- fully updated. -* Shairport Sync relies on a program called [`nqptp`](https://github.com/mikebrady/nqptp) to monitor timing signals. This program uses ports 319 and 320 and replaces any PTP service you have on the computer. - In addition, `nqptp` must run with `root` privileges. +* Shairport Sync relies on a program called [`nqptp`](https://github.com/mikebrady/nqptp) to monitor timing signals. This program uses ports 319 and 320 and replaces any PTP service you have on the computer. (FYI, most computers do not have a PTP clock running. They often use a (totally different) [Network Timing Protocol (NTP)](http://www.ntp.org) service to keep the system clock synchronised with world time.) * Shairport Sync has a build dependency on `nqptp`, so you should build or update `nqptp` *before* building or updating Shairport Sync. * 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 It means that one of the programs is out of date with respect to the other.