Stereo Tool
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Stereo Tool 5.02
https://forums.stereotool.com/viewtopic.php?t=2661		 Page 28 of 99
Author:  hvz [ Mon Oct 04, 2010 8:49 pm ]
Post subject:  Re: Stereo Tool 5.02
Quote:
2. Picture with loudest 'S' sound, (any highs same). This is even with Composite limiter at 105%. so boosted bit...
It's around 90% .. insted to be around 97-98 (can't know that now) .. it's going into volume drop.
Seems "HARD LIMIT" is doing part of this too.
Image

(fm-mode!)
Ok, there seems to be something wrong.

With 44.1 kHz input and output, I get a very very constant output level. Good.

With 176.4 kHz input and output, I don't!!!

First guess: It must be the upsampling at the end. But at the very least there is something really wrong here. Which probably also explains why the highs are lower (as Bojcha reported) - they seem to drop by upto 1.8 dB!

If I manage to fix this it will give a BIG quality boost! (or, more accurately, a highs boost without quality loss, which means that the highs can be lowered, which in turn gives a quality boost).


Edit: Looks like it's indeed the upsampling.
Edit #2: But it also looks like the upsampling should be ok in 'Direct Sound Card Access' mode. This is getting confusing :o
Edit #3: No it was always wrong! Seems fixed now... :D
Edit #4: Building update now :-)
Author:  Bojcha [ Mon Oct 04, 2010 9:20 pm ]
Post subject:  Re: Stereo Tool 5.02
let's see :)
Author:  Luke [ Mon Oct 04, 2010 9:45 pm ]
Post subject:  Re: Stereo Tool 5.02
that's the 1dB that I could hear :-)
Author:  Bojcha [ Mon Oct 04, 2010 9:56 pm ]
Post subject:  Re: Stereo Tool 5.02
Actually 1.8dB 8-)
And not only that! Before that unnecessarily boosted (by multiband or other step in chain) to compensate for that loss.
:P

Watch BBP mpx (same 'S' sound)
Image
Author:  hvz [ Mon Oct 04, 2010 10:12 pm ]
Post subject:  Re: Stereo Tool 5.02
Winamp DSP plugin: http://www.stereotool.com/download/dsp_ ... 510-26.exe
Stand alone version: http://www.stereotool.com/download/ster ... 510-26.exe
VST version: http://www.stereotool.com/download/vst_ ... 510-26.dll
VST version (No SSE2): http://www.stereotool.com/download/vst_ ... 510-26.dll
Command line version: http://www.stereotool.com/download/ster ... 510-26.exe
Linux command line version: http://www.stereotool.com/download/ster ... BETA510-26 (Build error - server was offline)
Author:  Bojcha [ Mon Oct 04, 2010 10:19 pm ]
Post subject:  Re: Stereo Tool 5.02
Better, but now artifacts in mpx even with Composite limiter at 101-102%!
Author:  athl0n [ Mon Oct 04, 2010 10:27 pm ]
Post subject:  Re: Stereo Tool 5.02
I found that I could not reproduce the 58kHz artifact until I changed my input sampling rate to 192 kHz which I believe Bojcha is using. I do not see the artifact at lower input sampling rates than 192kHz.
Author:  Bojcha [ Mon Oct 04, 2010 10:40 pm ]
Post subject:  Re: Stereo Tool 5.02
now in this beta there is no artifact at 58kHz...
btw .. as i said, now better level of highs and safe Composite limiter is at 101.3%
Author:  hvz [ Mon Oct 04, 2010 10:41 pm ]
Post subject:  Re: Stereo Tool 5.02
Quote:
Better, but now artifacts in mpx even with Composite limiter at 101-102%!
What kind of artifacts? I'm not seeing anything strange here, even at 105%.


Edit: By 'safe', do you mean that no volume drops occur?
Author:  Bojcha [ Mon Oct 04, 2010 10:46 pm ]
Post subject:  Re: Stereo Tool 5.02
Here it is ... Composite limiter at 105% (192 or 176.4kHz)
Image
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