Unable to stream 192kHz on DSM 5

[simoncn]

(14-07-2014 07:17)simoncn Wrote:  This is consistent with having insufficient CPU power to handle this decoding. I'm slightly surprised because I thought the CPU in the NV+ would be powerful enough for this.

I downloaded the sample 24/192 FLAC file (Vivaldi) from this Linn page. On my ReadyNAS Duo v2, it is transcoded without dropouts and uses about 22% of the CPU.

Code:

root@ReadyNAS:/c/media/Music# top
top - 23:37:10 up 16:58,  1 user,  load average: 0.00, 0.00, 0.00
Tasks:  72 total,   1 running,  71 sleeping,   0 stopped,   0 zombie
Cpu(s): 19.5%us,  2.0%sy,  0.0%ni, 77.6%id,  0.0%wa,  0.0%hi,  1.0%si,  0.0%st
Mem:    246820k total,   218928k used,    27892k free,    39604k buffers
Swap:   524268k total,        0k used,   524268k free,    93076k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
1995 root      20   0  230m  30m 5308 S 22.1 12.8   1:04.75 java
15813 root      20   0  2548 1184  936 R  0.3  0.5   0:01.92 top
    1 root      20   0  2016  700  608 S  0.0  0.3   0:20.71 init
    2 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kthreadd
    3 root      15  -5     0    0    0 S  0.0  0.0   0:00.01 ksoftirqd/0
    4 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 events/0
    5 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 khelper
    8 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 async/mgr
  123 root      15  -5     0    0    0 S  0.0  0.0   0:00.01 kblockd/0
  132 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 khubd
  154 root      20   0     0    0    0 S  0.0  0.0   0:00.00 crypto
  155 root      20   0     0    0    0 S  0.0  0.0   0:00.00 crypto_ret
  162 root      20   0     0    0    0 S  0.0  0.0   0:00.00 pdflush
  163 root      20   0     0    0    0 S  0.0  0.0   0:00.15 pdflush
  164 root      15  -5     0    0    0 S  0.0  0.0   0:00.02 kswapd0

Perhaps you have something else running on your NV+ that is consuming a lot of CPU and not leaving enough to do 24-bit transcoding. The 'top' command should show this.