All times are UTC+02:00




Post new topic  Reply to topic  [ 1012 posts ]  Go to page Previous 172 73 74 75 76102 Next
Author Message
PostPosted: Sat Mar 09, 2013 9:15 pm 

Joined: Sun Dec 12, 2010 2:26 pm
Posts: 885
Quote:
Quote:
Why are you using the scalar instructions instead of the packed / parallel instructions?
I use the parallel instructions in most of the performance sensitive code, but not everything is suitable to be parallellized.

In this specific case, the compressor, each sample depends on the samples before it. So I cannot process the next sample until I've processed the current - that's why I cannot process samples in parallel (cannot is a big word, it might be possible to find some tricks or to parallellize parts of the code. I just haven't seen them yet.)
That makes sense to me, at least given my limited understanding of this type of low level stuff. I was just wondering if and how that relates to your question over on the Intel forum about portions of the code that won't vectorize.

fft_abs_sse2[2*cc] = max(fft_abs_sse2[2*cc], strength * m);

for (int c=0; c<f1; c++)
{
temp[2*c] *= one_DIV_bass_static_clip_level_dynamic;
temp[2*c+1] *= one_DIV_bass_static_clip_level_dynamic;
}


Top
   
PostPosted: Sat Mar 09, 2013 10:14 pm 
User avatar

Joined: Wed Nov 19, 2008 7:44 pm
Posts: 1169
Location: Bulgaria
Forget about the instructions now.
We have a problem with the lowest band in MB ...
The "blop" effect . Also i see in the output scope some wave strange behavior when i put on low freq. tone say 35 40 Hz ? I can hear the "blop"effect .

The only strange thing is that when i put he Coupling to 100% this effect is reduced a little . I will make a video to show you all what i mean . And i`ll put it in the post after i make it.
Think that there is some wrong "calculation" in the filter.... other bands are not giving this effect. Tested with Bandpass OFF , same thing .All is coming from the MB


Top
   
PostPosted: Sun Mar 10, 2013 12:35 am 
User avatar

Joined: Sat Mar 10, 2012 8:15 pm
Posts: 154
Location: Nederland
Question about the coupling parameter in the multiband.

When i slide it to 100% much songs sounds like " muffie"
Try this song whith the r type preset from Bojcha
Alexis Jordan - Happiness
sounds not nice when you slide it to 100%
Or is this normal?

_________________
Garbage in is Garbage out !


Top
   
PostPosted: Sun Mar 10, 2013 1:32 am 
User avatar

Joined: Tue Sep 28, 2010 10:56 pm
Posts: 326
Location: Usa
I compared with Beta 45. I did nt try the next ones cause of cpu overload.

_________________
Sexy Girls in your city


Top
   
PostPosted: Sun Mar 10, 2013 4:39 am 
Site Admin
User avatar

Joined: Mon Mar 17, 2008 1:40 am
Posts: 11425
Quote:
Question about the coupling parameter in the multiband.

When i slide it to 100% much songs sounds like " muffie"
Try this song whith the r type preset from Bojcha
Alexis Jordan - Happiness
sounds not nice when you slide it to 100%
Or is this normal?
With coupling set to 100% all the bands will do exactly the same, so it behaves as a singleband compressor, although 'band mix' still works. So don't set it this high!

I think I should probably display the 'band calculation matrix' that is used. When I made this slider I viewed it by writing it to a file and it really helps to see what's happening. It might also be useful - extreme tweaking mode - to make this editable manually.


Top
   
PostPosted: Sun Mar 10, 2013 6:10 am 
User avatar

Joined: Tue Mar 17, 2009 2:56 pm
Posts: 4229
Quote:
Question about the coupling parameter in the multiband.
When i slide it to 100% much songs sounds like " muffie"
Try this song whith the r type preset from Bojcha
Alexis Jordan - Happiness
sounds not nice when you slide it to 100%
Or is this normal?
Preset is already VERY well balanced (maximum what bands can give) but yet preset/mb do full processing. For a reason coupling is disabled in preset - it does not need that, also, crossovers are tuned maximally to separate bands well already.


Top
   
PostPosted: Sun Mar 10, 2013 8:16 am 

Joined: Sat Sep 10, 2011 12:42 am
Posts: 123
Location: Australia
Setting BBP (default Rustonium settings) MPX output level to -3.0db feeding MPXTool, the peaks in MPXTool (default -3db input) frequently hit 100% modulation on most songs.

Setting ST (R-Style, latest beta) MPX output to -3.0db, with no composite limiting, peaks only frequently hit 92/93% modulation in MPXTool. Composite limiting has to be turned on quite high (~108/110%) to achieve peaks hitting 100%.

Is that expected and correct behavior?

And is sound card input still only 16 bit resolution ?


Top
   
PostPosted: Sun Mar 10, 2013 10:44 am 
User avatar

Joined: Wed Nov 19, 2008 7:44 pm
Posts: 1169
Location: Bulgaria
So , the video with the strange behave . When i turn the MB off it stops . Hans ?

http://www18.zippyshare.com/v/98468466/file.html


Top
   
PostPosted: Sun Mar 10, 2013 2:50 pm 
User avatar

Joined: Tue Mar 17, 2009 2:56 pm
Posts: 4229
Quote:
Setting BBP (default Rustonium settings) MPX output level to -3.0db feeding MPXTool, the peaks in MPXTool (default -3db input) frequently hit 100% modulation on most songs.
Setting ST (R-Style, latest beta) MPX output to -3.0db, with no composite limiting, peaks only frequently hit 92/93% modulation in MPXTool. Composite limiting has to be turned on quite high (~108/110%) to achieve peaks hitting 100%.
Is that expected and correct behavior?
And is sound card input still only 16 bit resolution ?
- Is it post amp at 0.00 (100%) ?
- Turn RDS OFF, since in BBP was not there when you tested
- Set composite to 102%
- Pilot 9.00% and RDS 4.53%

Result: http://i.imgur.com/6l04IFa.png

If you want RDS now set composite to 102+4.5, so ~ 106 or 107%.


Top
   
PostPosted: Sun Mar 10, 2013 2:52 pm 
User avatar

Joined: Fri Jan 27, 2012 10:36 am
Posts: 178
Location: den Helder / The Netherlands
Quote:
Setting BBP (default Rustonium settings) MPX output level to -3.0db feeding MPXTool, the peaks in MPXTool (default -3db input) frequently hit 100% modulation on most songs.

Setting ST (R-Style, latest beta) MPX output to -3.0db, with no composite limiting, peaks only frequently hit 92/93% modulation in MPXTool. Composite limiting has to be turned on quite high (~108/110%) to achieve peaks hitting 100%.

Is that expected and correct behavior?

And is sound card input still only 16 bit resolution ?
In BBP composite clipping can not be turned off, so the comparison is not fair in my opinion.
So, in order to make a good comparison, you should at least turn the composite limiter in ST "ON" since ST does not have a composite clipper YET. (i assume BBP uses this to some degree, depending on preset)

_________________
----------------------------------------------------------------------------
AIRCHAIN-GURU professional independant airchain consultancy.
Orban/Omnia/Vorsis/DSPX/Aphex/Inovonics
----------------------------------------------------------------------------


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 1012 posts ]  Go to page Previous 172 73 74 75 76102 Next

All times are UTC+02:00


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited