Stereo Tool

I'm currently trying to make it use multiple bands. It sounds much cleaner but for some reason I'm getting very bad MP3-like artifacts.

7.85 BETA011

Windows 32 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 85-011.exe
Winamp DSP: http://www.stereotool.com/download/dsp_ ... 85-011.exe
Windows VST 32 bit: http://www.stereotool.com/download/vst_ ... 85-011.dll

CHANGED:
- Improved Exciter: Now using 40 bands instead of 1

OLD CHANGES:
- Show something in settings that have been changed (for example a dot next to the name of the setting).
- Add license check function: extern "C" bool stereoTool_IsLicenseValid(gStereoTool* st_instance);
- Added some filtering to make sound less 'sandy' (distorted).
- Exciter: Check why it sometimes boosts audio around 10 kHz (?) more than it should (Johnnie Cash) - protection filter appears not to work completely. Compare what happens without protection filter! -> Fixed (more or less)
- Added a soft of exciter (not an FM exciter but something that generates highs). I've placed it (for now) under True Bass, and it cannot be configured yet. Not really sure what to make of it yet, I think I like it but it does sound a bit "rough" sometimes. Note: It can cause pre- and post ringing at higher latency settings (I will fix that later, first want to get a bit of a feeling for what it does).
- Make scope skinnable
- Bug: i found one malfunction in the BS412 Section: If your switch off the FM Option and leave the BS412 Limiter in On-Position the Advanced Clipper only works in a reduced way: You can´t change the Clipper drive even if you pull the handle. The BS412 Limiter is greyed out instead so maybe someone doesn´t find the failure. If You switch the BS412 to off everything works fine again! Just a small detail, but maybe someone will have problems… -> I think I have fixed it (but there are a lot of different combinations of settings that can impact the result, I hope I haven't missed any). The next version shouldn't have this problem anymore, also, when BS412 is used I have now disabled the Advanced Clipper Drive slider.
I've been busy hiding a lot more deprecated features (if they are set to their default value). This should make the GUI a bit simpler. Stuff that's now hidden (still there and still functional if you really want to use it):
- "Bass AGC (Old)" panel
- "Classic Multiband Compressor" panel
- "Classic Singleband" panel
- "Pre-limiter" panel (in Advanced Clipper)
- "Leif's clipper efficiency modification" checkbox
- "Composite clipping Strictness (CPU)" checkbox
- Phase rotation: ""At start of processing" checkbox
- AGC "Compatibility & behavior" header
- All Singleband and Multiband "Compressor type" (Analog/Digital) pull-downs
- Multiband and Natural Dynamics "Compatibility mode (bad)" for Flat Frequency Response checkbox
- "Bass protection (Deprecated)" header in Advanced Clipper -> Bass
- "Highs gap protection: *" in Advanced Clipper -> Highs
- "Smooth slope" in Advanced Clipper -> Distortion
- "Upsampled highs clipping (useless)" in Advanced Clipper -> Distortion
- Stokkemask: "Force Stokkemask even if not using Composite Clipping (bad for audio)"
- BS412: ""De-basser non-ITU.1770 compatibility mode (bad)"
- Right clicking now restores default again, mid or double right clicking restores last loaded preset (or startup) value.
Bug: If you use FM and Normal output, with separately processed audio for streaming for Normal output, and for FM output enable pre-emphasis but *not* pre-emphasize output, then Normal output is not processed separately!
- What is the pink line in the BS412 display? Maybe remove it. http://i.imgur.com/70mWvqp.png -> Ah no, it's the adjustment of the compressor thresholds. Needs to be added to Help page.
- BS412 has VERY narrow jump on de-basser from 240 to 250 Hz. (Jump of multiple dB's). -> No, brown line jumps but actual output is smooth, so no problem.
- BS412 bass filter doesn't use ITU1770 as it should but some weird other shape that goes up to about 250 Hz.
- Need to support 2 default values and a RESET TO LAST LOADED VALUE reset option.
- Hide not selected deprecated stuff - partially working!
- Move Copyright stuff etc. also to command line version (maybe just copy it?)

TODO:
- Try "True Bass" for highs -> Probably make a version where different modes (with/without filtering, with better HPF) are tested. Maybe also with multiple bands?? To reduce generated distortion.
- Continue with finding parameters to hide
- Try adding phase delay compensation
- O skin
- Blog post pre-processing
- Blog post MP3 and declipping

hans i got a little nan problem

Well, if I enable the Highs-Exciter, I only get choppy audio-output

Record of the result: http://www83.zippyshare.com/v/6Xev5R4i/file.html
(starts at about 10 seconds)

Hm... so the first 10 seconds were ok? Weird... I must have missed some divide by 0 or something like that I suppose.

Hans, here to if you select exciter button it sounds like you select difference button

Edit: i get a EXCEPTION i select exciter

I have found something suspicious and also improved the sound a bit further, so I will build and upload a new version.

7.85 BETA012

Windows 32 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 85-012.exe
Winamp DSP: http://www.stereotool.com/download/dsp_ ... 85-012.exe
Windows VST 32 bit: http://www.stereotool.com/download/vst_ ... 85-012.dll

EDIT: THIS VERSION IS ADDING FAR TOO MUCH HIGHS IN SOME CASES, AND IT SOUNDS MP3-ISH. WORKING ON IT, PLEASE IGNORE THIS FOR NOW...

CHANGED:
- Fixed some Exciter issues (which might have been the cause of errors that some people reported).

OLD CHANGES:
- Improved Exciter: Now using 40 bands instead of 1
- Show something in settings that have been changed (for example a dot next to the name of the setting).
- Add license check function: extern "C" bool stereoTool_IsLicenseValid(gStereoTool* st_instance);
- Added some filtering to make sound less 'sandy' (distorted).
- Exciter: Check why it sometimes boosts audio around 10 kHz (?) more than it should (Johnnie Cash) - protection filter appears not to work completely. Compare what happens without protection filter! -> Fixed (more or less)
- Added a soft of exciter (not an FM exciter but something that generates highs). I've placed it (for now) under True Bass, and it cannot be configured yet. Not really sure what to make of it yet, I think I like it but it does sound a bit "rough" sometimes. Note: It can cause pre- and post ringing at higher latency settings (I will fix that later, first want to get a bit of a feeling for what it does).
- Make scope skinnable
- Bug: i found one malfunction in the BS412 Section: If your switch off the FM Option and leave the BS412 Limiter in On-Position the Advanced Clipper only works in a reduced way: You can´t change the Clipper drive even if you pull the handle. The BS412 Limiter is greyed out instead so maybe someone doesn´t find the failure. If You switch the BS412 to off everything works fine again! Just a small detail, but maybe someone will have problems… -> I think I have fixed it (but there are a lot of different combinations of settings that can impact the result, I hope I haven't missed any). The next version shouldn't have this problem anymore, also, when BS412 is used I have now disabled the Advanced Clipper Drive slider.
I've been busy hiding a lot more deprecated features (if they are set to their default value). This should make the GUI a bit simpler. Stuff that's now hidden (still there and still functional if you really want to use it):
- "Bass AGC (Old)" panel
- "Classic Multiband Compressor" panel
- "Classic Singleband" panel
- "Pre-limiter" panel (in Advanced Clipper)
- "Leif's clipper efficiency modification" checkbox
- "Composite clipping Strictness (CPU)" checkbox
- Phase rotation: ""At start of processing" checkbox
- AGC "Compatibility & behavior" header
- All Singleband and Multiband "Compressor type" (Analog/Digital) pull-downs
- Multiband and Natural Dynamics "Compatibility mode (bad)" for Flat Frequency Response checkbox
- "Bass protection (Deprecated)" header in Advanced Clipper -> Bass
- "Highs gap protection: *" in Advanced Clipper -> Highs
- "Smooth slope" in Advanced Clipper -> Distortion
- "Upsampled highs clipping (useless)" in Advanced Clipper -> Distortion
- Stokkemask: "Force Stokkemask even if not using Composite Clipping (bad for audio)"
- BS412: ""De-basser non-ITU.1770 compatibility mode (bad)"
- Right clicking now restores default again, mid or double right clicking restores last loaded preset (or startup) value.
Bug: If you use FM and Normal output, with separately processed audio for streaming for Normal output, and for FM output enable pre-emphasis but *not* pre-emphasize output, then Normal output is not processed separately!
- What is the pink line in the BS412 display? Maybe remove it. http://i.imgur.com/70mWvqp.png -> Ah no, it's the adjustment of the compressor thresholds. Needs to be added to Help page.
- BS412 has VERY narrow jump on de-basser from 240 to 250 Hz. (Jump of multiple dB's). -> No, brown line jumps but actual output is smooth, so no problem.
- BS412 bass filter doesn't use ITU1770 as it should but some weird other shape that goes up to about 250 Hz.
- Need to support 2 default values and a RESET TO LAST LOADED VALUE reset option.
- Hide not selected deprecated stuff - partially working!
- Move Copyright stuff etc. also to command line version (maybe just copy it?)

TODO:
- Try "True Bass" for highs -> Probably make a version where different modes (with/without filtering, with better HPF) are tested. Maybe also with multiple bands?? To reduce generated distortion.
- Calculate target amplification levels for each bin using white (?) noise!
- Continue with finding parameters to hide
- Try adding phase delay compensation
- O skin
- Blog post pre-processing
- Blog post MP3 and declipping

still has issues on Exciter, after some seconds crash the sound and gaps

_________________
Sexy Girls in your city

So this version is now really much better. I have no gaps and problems with it, as opposed to the 11 version.

But something else struck me. In the 09 version there was meaningful overtones for some sounds. I have here an example in which in the 09 version, the strings have been completed properly. With the current version, however, nothing is completed. It simply lacks the whole information. If you want I can send you via PM these files. However, the completion now works better on percussion instruments. Sometimes, there are now some mp3 artifacts.

Edited: One more question: At what frequency the harmonics are completed? I had here a try with 11025 Hz. But no predictions were made in this file.