ClaudeBoulard wrote: > > MY goal will have 10 RPI players, and in some case I'd like to sync all > in the same group. That was the meaning of my question. > Hope that with a wired connection + 'powerfull' RPI server it will be > OK. >
If that's a common thing you want to do I'd make sure: 1. you have players with a pretty stable clock. I don't know how good the RPi really is in this respect, one thing you definitely want to avoid are re-clocking DACs as that adds a lot of variance. The synchronization in the Squeezebox system works by having the slowest player drop samples to catch up when the difference reaches 10ms (this is configurable). If all players play at almost the same speed that's not a big issue and won't happen a lot but if you have high tolerances 10 players can add up quite a bit and then you get a lot of skipping, if the server no longer knows how to sync it re-sets the whole stream which gives you an audible timeout. 2. you take some care about the bandwidth. Whether you use WiFi or a wired connection doesn't matter in a Raspberry Pi system, the Pi's bottleneck is that all of it's peripherals - including networking - are connected through a single 30mbps USB-2-bus. Typically, this is primarily an issue for scanning large libraries (scanning a few 100 GB of music files over that connection takes a while) not so much for streaming, but with 10 devices, it depends on what you do. If you stream CD quality as FLAC (the default), that would be ~7.5mbps and that's probably OK. If you stream the same thing as PCM (WAV) it will get to around 14mbps and since there's overhead and also other stuff is going over the same connection since the same 30mbps bus is shared by ALL peripherals that will be a close call. If you have HD music with 96kHz sample rate or higher and 24 bit sample size you will get close with FALC, too, and it certainly won't work over PCM. In this case I'd recommend something more powerful than a Raspberry Pi as the server. --- learn more about iPeng, the iPhone and iPad remote for the Squeezebox and Logitech UE Smart Radio as well as iPeng Party, the free Party-App, at penguinlovesmusic.com *New: iPeng 9, the Universal App for iPhone, iPad and Apple Watch* ------------------------------------------------------------------------ pippin's Profile: http://forums.slimdevices.com/member.php?userid=13777 View this thread: http://forums.slimdevices.com/showthread.php?t=110197 _______________________________________________ Squeezecenter mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/squeezecenter
