DSP Xover project (part 2) - Page 133 - diyAudio
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Old 23rd June 2013, 03:12 PM   #1321
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Join Date: Jun 2007
Location: Bavaria
Quote:
Originally Posted by chaparK View Post
Hi Sigi,

These figures look pretty much like what I'm getting with Bass/Treble on.

Can you please double check you have turned it off? ( Menu Settings -> Bass/Treble Settings, uncheck the Enable box).Nick
Well, I am getting a little bit confused! Although I unchecked the Bass/Treble when I started the 192 SR I had for core 0 =91% and 1= 91%? With Bass enabled core 0= 103%, core 1=93. So, I closed everything and made new setups. Now 192 Khz pass through showed 71 for core 0 and 69 for core 1.
I distributed all channels the same way I did yesterday (1,2,5,6,7,8) and got now 87 on core 0 and 86 on core 1!! No overflow anymore! And if I check bass/treble I get 91 for both. Can't understand this behaviour! Is there something remaining in the board DSP that first has to be cleaned? by powering off the board?
I observed this also when switching from analog to SPDIF, The DSP load goes higher and remains. Only after a new start from standby I get the original core load.
Well, at least for now all seems solved!!

If load can be reduced by unchecking nr. of channels this would be great. I personally also dont need pre-gain or post- gain adjustment in the channel configuration. The most important is the delay ( can be quite different for other systems)To have the possibility to check what is really needed would be great if it keeps DSP load lower.

Best regards
Sigi
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Old 23rd June 2013, 03:46 PM   #1322
chaparK is offline chaparK  Luxembourg
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There should be some explanation behind most of the things you can observe. That's why I had asked you to send me your nsf files, that's the place to start looking at if you observe a load which is unexpectedly high (some EQs lying around for example).

The load gets slightly higher when you select the SPDIF input because the routine is different: SPDIF requires that we check a couple of additional things before we can accept the incoming samples (such as the locked status).

Anyway, glad that the problem is solved now

Nick
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Old 23rd June 2013, 06:03 PM   #1323
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Nick, am also glad to have solved the problem, although I don't know why I have had this overload problem. Never defined any EQ, always unchecked basss/treble. Am using Acourate and the Acourate convolver for speaker and room correction, no need for EQ! This before going into Najda board.
Hope that some day it will be possible to incorporate the correction filters in Najda.
Cheers

Sigi
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Old 23rd June 2013, 10:23 PM   #1324
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sigi, have you tried the file I posted on page 132 ?
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Old 24th June 2013, 04:36 AM   #1325
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Quote:
Originally Posted by dahlberg View Post
sigi, have you tried the file I posted on page 132 ?
Hi Bengt, not yet, but I will today. I tried the other one you have send me, but the result was the same as I posted earlier, overload.
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Old 24th June 2013, 09:11 AM   #1326
F2a11 is offline F2a11  Germany
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Hello Jcga,
Is there a chance to get the dcx files for the front and rear panels from you?
A hopefull Najda user....
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Old 24th June 2013, 12:18 PM   #1327
jcga is offline jcga  France
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Quote:
Originally Posted by F2a11 View Post
Hello Jcga,
Is there a chance to get the dcx files for the front and rear panels from you?
A hopefull Najda user....
No problem to share the dxf files but I want to check first with the remaining pcbs supposed to arrive home this week.

Jean Claude
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Old 24th June 2013, 02:47 PM   #1328
F2a11 is offline F2a11  Germany
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Hi jcga,

That sounds very good! Sorry for the mistake, not dcx files ( maybe the long time with the Behringer?) the dxf files i need, if possible.

Best regards
Ulf
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Old 24th June 2013, 03:23 PM   #1329
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Quote:
Originally Posted by dahlberg View Post
sigi, have you tried the file I posted on page 132 ?
Hi, I tried it now. With expansion port 1 I get 91% on core 0 and 86% on core 1. If I switch to SPDIF I get 108% on core 0 and 86% on core 1.
Are your results the same? I checked that bass/treble is really unchecked!
if you intend to use this configuration I would recommend to put the passbands on channel 5 and 6. The rest on channel 1,2 and 7,8

Regards
Sigi
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Old 24th June 2013, 03:58 PM   #1330
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Quote:
Originally Posted by siginitz View Post
Hi, I tried it now. With expansion port 1 I get 91% on core 0 and 86% on core 1. If I switch to SPDIF I get 108% on core 0 and 86% on core 1.
Are your results the same? I checked that bass/treble is really unchecked!
if you intend to use this configuration I would recommend to put the passbands on channel 5 and 6. The rest on channel 1,2 and 7,8

Regards
Sigi
Yes, it overloads if I switch to spdif input. It stays in that way even if I
change back to expansion1 but goes back to the no overload numbers if I
restart the board.

That configuration would mean that mid (that has most done to it) and high freq would
share core 1. Core 0 would only have to cope with one xo point and no eq,
you mean that this would give a more even distribution of resources ? I have
taken it down for more work myself so there is no way to try this rigth now.

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