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Author Topic: 5.6 MHz DSD stutter  (Read 4502 times)

alice

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5.6 MHz DSD stutter
« on: January 14, 2015, 05:20:30 pm »
Hi All,

I have an issue on my jriver running on windows 8.1 .
After about 30 secs of play the music is stuttering.

The PC is dedicated music source and is streaming music through my NAS to my DAC via usb.

The lower bit rate DSD play fine, its only the 5.6 MHz.

The pre-buffering on jriver is set to 10 ms, and the buffering for audio is set to 500 ms.

Any help ?
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Matt

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Re: 5.6 MHz DSD stutter
« Reply #1 on: January 15, 2015, 11:48:34 am »
What if you set pre-buffering to 20 seconds?
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Matt Ashland, JRiver Media Center

6233638

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Re: 5.6 MHz DSD stutter
« Reply #2 on: January 15, 2015, 12:21:45 pm »
If it happens every 30 seconds or so, check that you don't have Memory Playback enabled.
 
Edit: The CPU and I/O spikes with DSD128 happen every 75 seconds or so for me, not every 30. Perhaps it is more frequent on a slower system however.
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alice

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Re: 5.6 MHz DSD stutter
« Reply #3 on: January 15, 2015, 04:11:23 pm »
20 secs pre buffering sets it into constant buffering issues.
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alice

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Re: 5.6 MHz DSD stutter
« Reply #4 on: January 15, 2015, 04:11:52 pm »
Quote from: alice on January 15, 2015, 04:11:23 pm
20 secs pre buffering sets it into constant buffering issues.

Memory playback is not enabled.
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Hendrik

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Re: 5.6 MHz DSD stutter
« Reply #5 on: January 15, 2015, 04:16:00 pm »
If this DSD stream you're playing is also multi-channel (5.1 or so) and DST compressed (from a SACD perhaps?), it can have quite strong CPU requirements. How fast is your system?
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alice

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Re: 5.6 MHz DSD stutter
« Reply #6 on: January 15, 2015, 04:43:36 pm »
Quote from: Hendrik on January 15, 2015, 04:16:00 pm
If this DSD stream you're playing is also multi-channel (5.1 or so) and DST compressed (from a SACD perhaps?), it can have quite strong CPU requirements. How fast is your system?

Its a 2 channel album, don't thing its compressed.
The machine is with Motherboard ASRock Q1900B, 4 GB RAM and OS and JRiver running on 64 GB SSD.
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Hendrik

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Re: 5.6 MHz DSD stutter
« Reply #7 on: January 15, 2015, 04:56:19 pm »
Hm, the J1900 CPU on that board isn't very fast, I can't really judge if its fast enough for DSD128. How much JRMark do you get? (Help -> Benchmark)
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alice

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Re: 5.6 MHz DSD stutter
« Reply #8 on: January 15, 2015, 05:11:08 pm »
Quote from: Hendrik on January 15, 2015, 04:56:19 pm
Hm, the J1900 CPU on that board isn't very fast, I can't really judge if its fast enough for DSD128. How much JRMark do you get? (Help -> Benchmark)

I haven't tried the benchmark, will check tonight and post.

As for the J1900, it was the only motherboard I could used for a fanless setup.
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alice

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Re: 5.6 MHz DSD stutter
« Reply #9 on: January 18, 2015, 04:19:20 pm »
The stats from benchmark :

=== Running Benchmarks (please do not interrupt) ===

Running 'Math' benchmark...
    Single-threaded integer math... 8.306 seconds
    Single-threaded floating point math... 4.353 seconds
    Multi-threaded integer math... 4.275 seconds
    Multi-threaded mixed math... 2.491 seconds
Score: 978

Running 'Image' benchmark...
    Image creation / destruction... 1.345 seconds
    Flood filling... 1.297 seconds
    Direct copying... 1.902 seconds
    Small renders... 4.659 seconds
    Bilinear rendering... 2.759 seconds
    Bicubic rendering... 1.958 seconds
Score: 1580

Running 'Database' benchmark...
    Create database... 1.001 seconds
    Populate database... 4.549 seconds
    Save database... 0.873 seconds
    Reload database... 0.123 seconds
    Search database... 3.141 seconds
    Sort database... 2.707 seconds
    Group database... 1.812 seconds
Score: 1514

JRMark (version 20.0.55): 1357
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JimH

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Re: 5.6 MHz DSD stutter
« Reply #10 on: January 18, 2015, 04:41:00 pm »
Not great. 
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6233638

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Re: 5.6 MHz DSD stutter
« Reply #11 on: January 18, 2015, 04:55:44 pm »
A JRmark score of 2000+ is recommended for stereo DSD64 (2.8MHz) playback.
That system is under-specced for 5.6MHz or Multichannel DSD playback.
 
You may be able to get away with bitstreaming on some hardware as long as the track is not DST-compressed (5.6MHz DSD should not be, while 2.8MHz DSD can be) but I'd recommend offline conversion to a PCM format (e.g. 176kHz FLAC/ALAC) if your system can't handle native DSD playback.
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alice

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Re: 5.6 MHz DSD stutter
« Reply #12 on: January 18, 2015, 05:15:02 pm »
Thanks for the feedback, 2.4 plays fine its only the 5.4.
Does it mean its my motherboard or my cpu thats the problem ?

I was under the impression its my lan or the NIC interface on the computer.
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dtc

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Re: 5.6 MHz DSD stutter
« Reply #13 on: January 18, 2015, 10:08:39 pm »
I can play 5.6 DSD on a Netbook with an atom processor without any stuttering. The files are on a usb connected drive, not a NAS. As a test, I would suggest you try putting some of the files on the internal drive and see how that works. If that works, try a usb drive if possible. My guess is that the problem may be the NAS connection rather than the CPU itself. I tried a NAS setup with my Netbook and never could get consistent playback of high rez files. I have pre-buffering set at 2 seconds. You might try that. For high rez, I also put 3 seconds of silence at the end of each track and 2 seconds of silence at the beginning of each track to help with pre-loading. The system is bitstreaming to a usb DSD capable DAC. JMark - Math 278, Image 465, Database 687, Overall 477. Now that is one slow machine. It is running Windows 7 Starter with no anti-virus and no network activity when playing music, except a JRiver client used as a remote control. The testing I suggest may give more information about what is causing the problem.
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6233638

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Re: 5.6 MHz DSD stutter
« Reply #14 on: January 18, 2015, 10:27:46 pm »
That'll be the difference between bitstreaming and not, then.
Only DST-compressed DSD still requires a decent amount of CPU power to bitstream, since the DST compression must still be removed.
 
I agree though, test by copying some files over to a local drive rather than the network.
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alice

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Re: 5.6 MHz DSD stutter
« Reply #15 on: January 19, 2015, 04:14:31 pm »
I copied some 5.6 Mhz files on the local SSD and they played as they should.

So seems like its the network ?

Don't think it will be the interface, I feel its the 100 Mbps powerline adapter.
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dtc

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Re: 5.6 MHz DSD stutter
« Reply #16 on: January 19, 2015, 04:59:18 pm »
Good news. Did you try 2 second pre-buffering? 
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alice

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Re: 5.6 MHz DSD stutter
« Reply #17 on: January 19, 2015, 05:13:01 pm »
Quote from: dtc on January 19, 2015, 04:59:18 pm
Good news. Did you try 2 second pre-buffering? 

No I didn't , will give it a try.
Thanks
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