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More => Old Versions => JRiver Media Center 19 for Windows => Topic started by: AlexP on July 20, 2014, 01:22:22 pm

Title: Quad DSD requires fast processor?
Post by: AlexP on July 20, 2014, 01:22:22 pm

I was playing around with some settings trying to deal with the crackling noise that I posted earlier yesterday, as came around trying quad DSD settings that does not play smooth. It is rather stater playback.

I remember many people mentioned that it requires fast CPU.

When I look into performance monitor, the CPU does not look busy. My i5 could go up to 3.4 ghz. But it stays below 1 ghz. The CPU load is about 10 -12 %.

When I looked into individual cores consumption, it did not look like any core is at 100%. I guess the dsd conversion is likely single threaded. Am I correct?

When I just start up my PC, while loading services I can see my CPU is at 3.4 ghz and busy, so if asked it would go up to 3.4

Anyone to share your experience on now jriver manages a CPU load?

Thanks,
Alex

Title: Re: Quad DSD requires fast processor?
Post by: Matt on July 20, 2014, 03:00:13 pm

DSD encoding is single threaded.  You could try increasing buffering in Options > Audio and see if that helps.

Title: Re: Quad DSD requires fast processor?
Post by: AlexP on July 20, 2014, 03:50:49 pm

No, increasing buffer didn't not fix the problem entirely.

My question was a bit different though. If jriver push CPU hard enough being single threaded, I would expect the following:
1. About 25 % CPU consumption for a single threaded process on 4 core CPU.
2. Push the CPU to 3.4 ghz assuming high load. What I can see it stays at 0.75 ghz.

Thanks for your reply.
Alex

Title: Re: Quad DSD requires fast processor?
Post by: AlexP on July 20, 2014, 10:41:20 pm

Probably quad DSD is more competitive feature rather than practical.
I do not think CPU  like i5 is underpowered. It is rather there is a bottleneck in the dsd converter algorithm that underutilize the CPUs.

Speaking of feature priority, I do not think that at this point it makes sense to go beyond a claim that such feature is available.

If you disagree, chime in.

Alex

Title: Re: Quad DSD requires fast processor?
Post by: AlexP on July 21, 2014, 12:59:33 pm

Quote from: Matt on July 20, 2014, 03:00:13 pm

DSD encoding is single threaded.  You could try increasing buffering in Options > Audio and see if that helps.

Matt,

Quick question is the DSD encoding is single threaded per channels, in other words different channels DSD processing could be done on different CPU cores?

Thanks,
- Alex

Title: Re: Quad DSD requires fast processor?
Post by: Matt on July 21, 2014, 01:06:17 pm

Quote from: AlexP on July 21, 2014, 12:59:33 pm

Quick question is the DSD encoding is single threaded per channels, in other words different channels DSD processing could be done on different CPU cores?

It uses a single core.

Title: Re: Quad DSD requires fast processor?
Post by: AlexP on July 22, 2014, 07:36:40 pm

As was suggested by another member of this forum, I set power saving settings into high performnce mode, and it did the trick. Quad dsd started to work.

Thanks everyone for help :-)

Alex