mrw wrote: 
> I should have remarked that my experience has been with LMS 8.0.1. A
> point of detail that had passed me by.
> 
> I installed LMS 8.1 on a 'spare' server this morning (macOS - plenty
> power). And I think that I might have experienced something of the same.
> As in a certain amount of stuttering at the start of the stream. I'm not
> particularly aware of micro-stuttering, but possibly...
> 
> I'll keep my Radio playing out on LMS 8.1 today in an attempt to see how
> matters proceed. Perhaps you might add an LMS 8.0.1 vs LMS 8.1
> comparison into your investigations.

I've upgraded the radios again and looked at the var/log/messages log.

I get these 'Audio underun' and 'OUTPUT UNDERRUN'messages that seem to
coincide with the juddering and micro stuttering.  Are they relevant?  I
don't get similar methods with any other format (e.g forcing flac
transcoding)


Code:
--------------------
    
  Jan  6 13:23:33 squeezeplay: INFO   audio.decode - decode_start_handler:281 
init decoder aac                                                   
  Jan  6 13:23:33 squeezeplay: INFO   audio.decode - Playback.lua:477 connect 
172.16.0.8:9000 GET /stream.mp3?player=00:04:20:2a:dd:41 HTTP/1.0^M             
      
  Jan  6 13:23:36 squeezeplay: INFO   applet.NowPlaying - 
NowPlayingApplet.lua:422 enable volume UI in NP                                 
                          
  Jan  6 13:23:38 squeezeplay: INFO   audio.decode - decode_start_handler:281 
init decoder aac                                   
  Jan  6 13:23:38 squeezeplay: INFO   audio.decode - Playback.lua:477 connect 
172.16.0.8:9000 GET /stream.mp3?player=00:04:20:2a:dd:41 HTTP/1.0^M
  Jan  6 13:23:42 squeezeplay: INFO   audio.decode - decode_start_handler:281 
init decoder aac                                                                
         
  Jan  6 13:23:42 squeezeplay: INFO   audio.decode - Playback.lua:477 connect 
172.16.0.8:9000 GET /stream.mp3?player=00:04:20:2a:dd:41 HTTP/1.0^M             
                              
  Jan  6 13:23:54 squeezeplay: INFO   audio.decode - decode_start_handler:281 
init decoder aac                                                                
     
  Jan  6 13:23:54 squeezeplay: INFO   audio.decode - Playback.lua:477 connect 
172.16.0.8:9000 GET /stream.mp3?player=00:04:20:2a:dd:41 HTTP/1.0^M             
  
  Jan  6 13:23:56 squeezeplay: playback_callback:346 Audio underrun: used 288 
frames, requested 480 frames. elapsed samples 27360                
  Jan  6 13:23:56 squeezeplay: playback_callback:346 Audio underrun: used 192 
frames, requested 480 frames. elapsed samples 30528                             
                             
  Jan  6 13:23:56 squeezeplay: playback_callback:346 Audio underrun: used 64 
frames, requested 480 frames. elapsed samples 31680                 
  Jan  6 13:23:56 squeezeplay: playback_callback:346 Audio underrun: used 128 
frames, requested 480 frames. elapsed samples 33664                
  Jan  6 13:23:56 squeezeplay: playback_callback:346 Audio underrun: used 192 
frames, requested 480 frames. elapsed samples 36672
  Jan  6 13:23:56 squeezeplay: INFO   audio.decode - Playback.lua:364 OUTPUT 
UNDERRUN                                                                        
      
  Jan  6 13:24:02 squeezeplay: INFO   audio.decode - decode_start_handler:281 
init decoder aac                         
  Jan  6 13:24:02 squeezeplay: INFO   audio.decode - Playback.lua:477 connect 
172.16.0.8:9000 GET /stream.mp3?player=00:04:20:2a:dd:41 HTTP/1.0^M
  Jan  6 13:24:03 squeezeplay: WARN   net.thread - NetworkThread.lua:146 
network thread timeout for Task(SocketHttp {baby.squeezenetwork.com}(R))
  Jan  6 13:24:04 squeezeplay: WARN   net.thread - NetworkThread.lua:146 
network thread timeout for Task(SocketHttp {baby.squeezenetwork.com}(R))
  Jan  6 13:24:04 squeezeplay: playback_callback:346 Audio underrun: used 224 
frames, requested 480 frames. elapsed samples 41760        
  Jan  6 13:24:04 squeezeplay: playback_callback:346 Audio underrun: used 256 
frames, requested 480 frames. elapsed samples 45824                             
                             
  Jan  6 13:24:04 squeezeplay: INFO   audio.decode - Playback.lua:364 OUTPUT 
UNDERRUN          
  
--------------------


I'll have a go with the LMS 8.0 later.



*BBC Sounds Plugin Wiki* : 
https://github.com/expectingtofly/LMS_BBC_Sounds_Plugin/wiki
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View this thread: http://forums.slimdevices.com/showthread.php?t=113479

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