PasTim wrote: > Sorry, I wasn't clear. How can a max sample rate of 96000 be OK for a > 96000 track, but not OK for a 192000 track? > > > I tried loads of things, but mainly uncompressed wav at 96000 (fixed), > 16 or 24 bit. I wasn't mostly using 'raw', but 'wav'. I'm not going to > try again for a while to give more detail - I need a break from this - > sorry.
Tests can wait, but here is the explanation for your post https://forums.slimdevices.com/showthread.php?103728-Announce-UPnPBridge-integrate-UPnP-DLNA-players-with-LMS-(squeeze2upnp)&p=919308&viewfull=1#post919308 1- When you play the 24/192 track, it's beyond what you have passed to LMS as Marantz's capabilities (96000), so at that point LMS must choose a new sample rate and *format* 2- I do't have the server log at that time, but if you look at the UPnP log, LMS chooses to reencode the track to MP3 Code: -------------------- [12:54:48.805927] sq_callback:297 [0x74b440]: artist:John Butt album:Bach - The Well-Tempered Clavier Book I - Butt (excerpt) title:The Well-Tempered Clavier Book I - Prelude and Fugue No.21 in Bâ* BWV.866 - 1. Prelude genre:Classical; Piano Solo duration:74.838 size:0 cover: offset:0 [12:54:48.806088] sq_callback:324 [0x74b440]: current URI set http://10.99.55.10:49155/bridge-1.wav [12:54:48.806386] AVTSetURI:91 [0x74b440]: uPNP setURI http://10.99.55.10:49155/bridge-1.wav (cookie 0x1) [12:54:48.807826] process_start:1140 [0x6c8080]: codec:m, ch:0, s:0, r:0 [12:54:48.808036] stream_sock:397 [0x6c8080] connecting to 10.99.55.10:9000 [12:54:48.808498] stream_sock:426 [0x6c8080] header: GET /stream.mp3?player=00:06:78:09:50:ce HTTP/1.0 -------------------- 3- The maximum rate for MP3 is 48k, so here is the explanation for the 48k. MP3 also only supports 16 bits, as you know 4- Then the bridge receives that mp3 and the resample rate s:24,r:96000 forces it to resample from 48000 to 96000 5- You've also set the bridge to resize to 24 bits, always, so here it what it does (in wav) Code: -------------------- [12:54:53.139083] resample_newstream:204 [0x6c8080]: resampling from 48000 -> 96000 [12:54:53.141709] process_newstream:121 [0x6c8080]: processing: active [12:54:53.268102] _output_new_stream:419 [0x6c8080]: encoding in PCM r:96000 s:24 f:w -------------------- That explains why a 24/192 ends in being received as 16/48 and then transformed into 24/96 In the other example, you play a 24/192 track with no higher set 1- Same thing happens, 24/92 is above player's abilities, so transcoded is done in 16/48 MP3 Code: -------------------- [12:59:23.055747] sq_callback:297 [0x74b440]: artist:John Butt album:Bach - The Well-Tempered Clavier Book I - Butt (excerpt) title:The Well-Tempered Clavier Book I - Prelude and Fugue No.21 in Bâ* BWV.866 - 2. Fugue genre:Classical; Piano Solo duration:98.417 size:0 cover: offset:0 [12:59:23.055889] sq_callback:324 [0x74b440]: current URI set http://10.99.55.10:49155/bridge-1.wav [12:59:23.056155] AVTSetURI:91 [0x74b440]: uPNP setURI http://10.99.55.10:49155/bridge-1.wav (cookie 0x1) [12:59:23.056734] process_start:1140 [0x6c8080]: codec:m, ch:0, s:0, r:0 [12:59:23.056833] stream_sock:397 [0x6c8080] connecting to 10.99.55.10:9000 [12:59:23.057128] stream_sock:426 [0x6c8080] header: GET /stream.mp3?player=00:06:78:09:50:ce HTTP/1.0 -------------------- 2- The bridge receives the same 16/48 MP3 but this time the resample rule says s:24r:-96000, so the bridge will only downsample if the track is *above* 96. 48 is below, so it leaves it as is 3- You've forced sample size at 24 bits, os it does that. Here is the result (in wav) Code: -------------------- [12:59:27.608120] resample_newstream:247 [0x6c8080]: disable resampling - rates match 48000 [12:59:27.608171] process_newstream:121 [0x6c8080]: processing: inactive [12:59:27.705355] _SyncNotifState:484 [0x74b440]: uPNP transition [12:59:27.771311] _output_new_stream:419 [0x6c8080]: encoding in PCM r:48000 s:24 f:w -------------------- It all works as expected. Now I'm not sure why LMS choose MP3 to obey the "not above 192k rule, but I can tell you mine does the same, I just tried before writing that post. I will look into that LMS 7.7, 7.8 and 7.9 - 5xRadio, 3xBoom, 4xDuet, 1xTouch, 1 SB2. Sonos PLAY:3, PLAY:5, Marantz NR1603, JBL OnBeat, XBoxOne, XBMC, Foobar2000, ShairPortW, JRiver 21, 2xChromecast Audio, Chromecast v1 and v2, , Pi B3, B2, Pi B+, 2xPi A+, Odroid-C1, Odroid-C2, Cubie2, Yamaha WX-010, AppleTV 4, Airport Express, GGMM E5 ------------------------------------------------------------------------ philippe_44's Profile: http://forums.slimdevices.com/member.php?userid=17261 View this thread: http://forums.slimdevices.com/showthread.php?t=103728
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