INTERACT FORUM

More => Old Versions => JRiver Media Center 25 for Windows => Topic started by: the shiz on October 28, 2019, 08:39:25 pm

Title: 8X DSD Stuttering issues
Post by: the shiz on October 28, 2019, 08:39:25 pm

Everything works fine with my Oppo UDP205 except when I try to use it in 8X DSD in ASIO. It starts to stutter. I tried changing setting but nothing helps.

Title: Re: 8X DSD Stuttering issues
Post by: Awesome Donkey on October 29, 2019, 04:09:46 am

I take it you're upsampling everything (via DSP Studio > Output Format > Output Encoding) to 8xDSD? If so, DSD conversions are one of the most resource intensive operations MC can do especially if it's multichannel, and doing 8xDSD with it stuttering likely means your machine isn't powerful enough to handle 8xDSD conversions on-the-fly.

Title: Re: 8X DSD Stuttering issues
Post by: tyler69 on October 29, 2019, 05:23:52 am

Does MC use hyperthreading when upsampling (or any other DSP for that matter)?

Title: Re: 8X DSD Stuttering issues
Post by: the shiz on October 29, 2019, 08:34:53 am

Precision T7610, Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz, L2 Cache Size: 1536, 18g RAM. Not sure how much more power is needed. It happens when I upsample from anything, including other DSD formats.

Title: Re: 8X DSD Stuttering issues
Post by: Hendrik on October 29, 2019, 08:38:59 am

Thats actually not that strong of a CPU (anymore), its 6 years old and has a low per-core clock. Its very likely that its overwhelmed trying to upsample to 8x DSD.

Title: Re: 8X DSD Stuttering issues
Post by: the shiz on October 29, 2019, 08:41:58 am

even at 6 cores? what would I have to upgrade to stop the stuttering?

Title: Re: 8X DSD Stuttering issues
Post by: Hendrik on October 29, 2019, 08:43:47 am

We can't really give hardware recommendations, as it can depend on many factors, and we can't guarantee that it would work, and as others have said above, DSD 8x is about the most CPU intensive you can do for audio.

Title: Re: 8X DSD Stuttering issues
Post by: dtc on October 29, 2019, 09:32:36 am

Run a JMark test (Help - Benchmark) and report that. If it works converting to 2x DSD and 4x DSD and not 8X DSD it is almost certainly the CPU.

Look at Task Manager and Resource Monitor when it is stuttering. I think you will find it is single threaded.

Make sure nothing else is running.

But, yes, you have an old CPU.

Upsampling from one DSD format to another is a killer. It converts the original DSD to PCM and then back to DSD.  That is very intensive and probably not the best for an audio perspective.

Title: Re: 8X DSD Stuttering issues
Post by: Awesome Donkey on October 29, 2019, 11:45:43 am

Quote from: dtc on October 29, 2019, 09:32:36 am

That is very intensive and probably not the best for an audio perspective.

And it's a lossy conversion.

Title: Re: 8X DSD Stuttering issues
Post by: the shiz on October 30, 2019, 11:54:28 pm

It uses 28% of CPU & 4.7gig out of 16gigs of ram, while its at 8x dsd and stuttering.

Benchmarks Test: (not sure what this really means)

Running 'Math' benchmark...
    Single-threaded integer math... 5.370 seconds
    Single-threaded floating point math... 3.577 seconds
    Multi-threaded integer math... 2.408 seconds
    Multi-threaded mixed math... 1.605 seconds
Score: 1466

Running 'Image' benchmark...
    Image creation / destruction... 0.712 seconds
    Flood filling... 0.724 seconds
    Direct copying... 0.380 seconds
    Small renders... 1.694 seconds
    Bilinear rendering... 1.166 seconds
    Bicubic rendering... 0.715 seconds
Score: 4081

Running 'Database' benchmark...
    Create database... 0.250 seconds
    Populate database... 1.306 seconds
    Save database... 0.166 seconds
    Reload database... 0.070 seconds
    Search database... 1.816 seconds
    Sort database... 1.292 seconds
    Group database... 0.785 seconds
Score: 3782

JRMark (version 25.0.113 64 bit): 3110

Title: Re: 8X DSD Stuttering issues
Post by: Awesome Donkey on October 31, 2019, 02:48:03 am

It's okay for normal uses, but it's likely choking on 8xDSD, as mentioned above.