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In Reply to: RE: New GA-H77M-D3H: issues with resampling. posted by Laurent D. on May 08, 2012 at 13:36:09
L,
Sorry to hear of your troubles.
Have you done the cmp2 tweaks or are not. It sounds like you havent. All that disabling will help improve things. Check IRQ if you can and make sure your soundcard (sounds like the onboard audio) has its own IRQ and it is not shared.
You might be better off with an asio soundcard like the Juli@ if you are using onboard.
And run the dpc latency checker that should tell you a bit of what is happening.
Also I think you might be running into problems with the onboard audio resampling. So cplay is doing 96k and the mobo is downsampling to 48k. I had that on an old asus mobo and it caused all types if issues.
I think though it might be the I3 processor. All I know is that the old hardware with the e7400 processor had no issues with 192k, but the best I could ever get was 176k with the I3. And that took many many builds to get that.
Afterwards we discovered faith; it's all you need
Follow Ups:
Hi D.,Thanks a lot for your help.
I ran DPC latency checker. Results seems good, see image below. What do you think ?
Regarding the soundcard, at the moment it is effectively onboard audio. I will buy the soundcard and make the dedicated CMP² PC later on (but in the meantime I want to play with settings and then to be able to make IIR or FIR filtering for multiamp). I know onboard ship will give poorer results (however the onboard one is supposed not to be the worst one (SNR claimed to be 108 or 110dB)).
IRQ : I see the audio has got IRQ no 22, it is not shared with another device. I understand this is OK.
Regarding settings, I am using the settings I had put in place when I was using the previous mobo/processor (Asus & Pentium D 915). I just changed mobo & processor and kept the HDD as is. The HDD had Two Windows boot: A first one almost fully optimized for CMP² and a second one for internet, pictures, etc. It happens that the second boot is fully operational (appart from this little audio problem...) while the first boot (which opens automacially with the CMp screen) is completely locked and then unusable now.
... Maybe I need to start the a complete reinstallation of Windows of redo the settings (at least for the boot dedicated to CMp)??
I 'll try that next WE if I have some time to spare.
You also mention : "So cplay is doing 96k and the mobo is downsampling to 48k" However, I can reach 192kHz with foobar but not with ASIO, so ...?
Laurent
Edits: 05/10/12
Hi Laurent.
Thanks for sharing the dpc latency numbers. In the context of a cmp2 box those are really bad. Though I agree that is not bad for audio in general.
I really think the culprit is the onboard mobo. It isnt that it doesnt sound good, but that it is resampling. So the system is upsampling and downsampling simultaneously and that is causing the issue. Too much stuff going on.
The reason you can do it with Foobar is that the built in src is not as good a that in cplay but it is more processor "light". Back in the day I could do higher rates with the default foobar src with my under powered via machine. But the better src plugins wouldnt work.
You can test this theory a bit. If you are using the 145db setting in cplay try the 121db setting. If you are having trouble with the 121db setting then try sox. Sox is more light weight in its processing.
Also are you using flac? Flac is more problematic with upsampling IME. Try a wav file.
Here is a video that I made of the same file as .wav and the same file as flac and the flac stutters like crazy but the wav plays great. This was in Foobar and a lot of resampling and stuff was going on. This was with onboard and I seem to recall that it indeed was resampling to 48k from the 176k I was getting from Foobar.
I would start over myself. Those latency numbers are high. Though it might not be the installation.
Afterwards we discovered faith; it's all you need
Hi Dawnrazor,
I tried the wav file & SoX/HQ : No way.
I also looked at CPU % while running Cplay @ 145dB src, "upampling" from 44.1 to 48kHz : 4%.
Is there any way to educate this culprit ? (I mean, is there something to do do with the settings, or was the mobo's choice the wrong choice ?).
Will the future dedicated soundcard get around the issue ?
I am wondering if HDMI on the mobo is the issue (ie it would downsample the upsampled stream that would be seen as a kind illegal stream therefore down sample it ?)=> Is there a way to disable HDMI (I've looked around on google, did not find how to yet).
Regarding the issue of latency, can this be due to the above mentioned issue ? Again will the future dedicated sound card resolve the issue ?
(Regarding the future sound card, I am thinking of Auzentech Meridan 7.1 2g, Juli@ is only stereo, and at the end of the day I want to make a FIR crossover on the PC for multiamp... I am wondering if this will further complicate things?).
See also the pics below and the statement about supported/not supported sampling rate.
(On the first pic, sometimes (rarely) ASIO4all displays 8x192kHz instead of 8x48kHz (but I can't tell you why it happens "sometimes", and anyway, when this happens, I still get the issue).
(The 2nd & 3rd pic are obtained with ASIO Caps soft).
Note that with the hardware buffer on in ASI4ALL, Asio Caps removes 96 & 192 kHz from the supported sampling rates (See the 3rd pic). Whereas if I remenber correctly on the previous mobo/CPU (Asus& Pentium D 915) Hardware buffer was a key setting to get 192 kHz (145db SRC without any problems). Can this gives indication on the issue ?
Laurent
From those picts it does look like there is downsampling to 48k going on. IIRC this is what happened to me too with onboard. The specs said 192k and you could play a file, but the output was always 48k.
A soundcard that supports higher rates would solve that issue. If you are biamping then make certain that the card you are looking at has ASIO drivers. It is pretty impossible to use FIR filters without that.
FWIW all the inmates I know who do multiamping are using the Lynx cards last I heard, including myself.
If the auzentech has an asio driver you should be OK.
Good luck
Afterwards we discovered faith; it's all you need
Hi again,
I had some progress with disabling hyper-threading and removing the "SRS sound premium driver that came along the VIA driver (SRS makes some sound processing ... that sounds odd!).
These settings allowed me to to run Cplay at 96kHZ, and 192 kHz with some glitches.(Strange thing is that I had to make several Cplay trails before it worked).
Then I enabled back the input channels in ASIO4ALL just to try ... and then surprisingly (to me) I can have Cplay to run at 192 kHz without glitches!
What still worries me is what you mention: downsampling by the mobo. maybe this happens after CPlay ? So would you know a way to monitor this?
Otherwise I went to see Serge's site. I saw his DPC latency of 1µS ... Far from th 50µS I have on my set up!
The next issue I am facing is that I have tried this morning to resintall XP pro, but now I get the blue screen when reading the installation CD!
Another few hours to spend I presume to solve the issue.
For the Auzentech soundcard, I found that review of Presto (link at the bootm), which is more or less what I want to do and Presto seems satisfied with ASIO & Crossover. So I'll probably go for it soon.
Many Thanks for your comments and help Dawnrazor, that helped me keeping trying to go ahead.
I'll see also Serge's site in depth, probably a lot to learn there.
Laurent
Hi Laurent,
See I told you the 50ms was high!
The only way I know to know for certain what your system is outputting is to connect the spdif out and see what a sample rate a dac says. You probably arent in that position.
Anyhow glad you are making progress. That is interesting about the SRS and the asio4all settings. There clearly is some process going on that was mucking things up.
IMHO this is a great thing. It is causing you to move to a soundcard and ditch asio4all which will only help your sound quality.
Afterwards we discovered faith; it's all you need
If I do believe my ears, it looks like 192kHz is really going through. Comparing 192 over to 44.1, it's easier to follow the different instruments, and overall music is more pleasant.
What's also to be remembered is that settings are'nt the same from one mobo to the other, it seems also to me that settings can be dependent of others.
Ok, now i'll try the Auzentech Meridian. Also have some work to do with reisntalling XP...
Laurent.
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