Stereo Tool

BETA042:
Improved artifact filtering.
Enabled Natural Dynamics filter (but it doesn't behave correctly yet, lows are boosted less than highs). Good values for the slider: Around 40% (I think). Use DIFF to hear what it does exactly.
(Sorry no time to type more right now - will do that later)>

From the previous beta (still valid):
The CPU load is also pretty high because I'm calculating 32 different tilt levels to find the best match (so automatic tilt detection works, but it needs serious optimization).

New slider: "Declipping margin" - if you set this to 75%, everything above 75% of the maximum level is considered to be potentially clipped.

Changed slider: "Never consider samples to be clipped if they are lower than:" - rule out soft sounds, whatever they look like, they are not clipped.


Winamp DSP plugin: http://www.stereotool.com/download/dsp_ ... 20-042.exe
Stand alone version: http://www.stereotool.com/download/ster ... 20-042.exe
VST version: http://www.stereotool.com/download/vst_ ... 20-042.dll
VST version (No SSE2): http://www.stereotool.com/download/vst_ ... 20-042.dll
Command line version: http://www.stereotool.com/download/ster ... 20-042.exe
Linux command line version: http://www.stereotool.com/download/ster ... ETA620-042 NOT AVAILABLE
Linux GUI version: http://www.stereotool.com/download/ster ... ETA620-042 NOT AVAILABLE

TODO:
- Fix loading changed multiband frequencies
- Add buffer and filter for SCA output (SCA1 ok, SCA2 ok)
- Finish AGC improvement - make mono value configurable (replace checkbox by slider) 1 hour --> NO, not needed - anything else needed? -> NO
- Fix Punch
- Check what to do with new filters (such as bass AGC) - keep them, remove them, change them? --> KEEP
- Save new BASS_AGC setting in VST mode
- Loudness: Annoying cracking sound in bass. Slightly present in 5.00, worse in 6.00, maybe even worse in 6.10. Only when bass is too loud. Much worse than in Final Limiter (at same input level!) - so this clearly indicates a bug. Most likely cause: The filter that was added to remove bass artifacts....... - No, it's the louder bass. But it can be fixed by changing some settings. Default settings updated, and behavior for 'not Very strict' improved. Also Deep bass boost and Very deep bass protection are enabled for latency 512 now.
- Fix crash at program close
- Fix VST plugin version (does not run)
- Dynamically drop 'Allow louder highs, even if it causes vibrations' to 0 when bass filter suspects noticeable voice vibrations. 1-2 hours
- Reduce Loudness CPU load days?
- Check and remove static variables
- Finish new de-essing filter (check what to do with the settings, remove at least some!) 1 day
- Convert Multiband input to MONO, then use arrays [2][4096] --> should give speedup. - FAILED
- Finish declipping filter (clipping level detection + level reduction in dB). 2 days
- Update presets? (BASS_AGC etc.) 1 day
- Finish blind interface
- Add AGC start level
- "Test Right Channel" in "FM Transmitter Calibration" does not work since v6.10 (standalone) (bojcha)
- Channels L/R swap in stand alone version when changing filtering/quality (?) (eldoradofm)
- Change version number 1 hour
- Release 1 hour
- Add lowpass filter for stereo signal (will cause a lot of extra latency!) - it might be possible to avoid this latency using a Hilbert transform
- Add smarter clipping detection. Maybe something much simpler suffices: Current clipping detection with threshold + flat line detection

Sorry to say, but can't set slider in stand alone version because it's still grayed out.

It seems that the dynamic boost set to 50% does have an effect to agc. Winamp version.


Newest Winamp version supports now 192khz. I didnt knew that older versions doesnt support, or maybe i´m wrong. Source: http://www.winamp.com/help/Version_History#Winamp_5.61

You're wrong. "ml_rg" is the ReplayGain plugin for the Media Library. That's what now supports 192kHz.

Ah ok, thank you for explain that.

I am not sure if you are aware of the fact that it is now possible to change the center frequencies for every multiband inside .STS preset !
This (hidden option) could help for your preset project.
(It is even possible do disable bands, but I don't remember exactly how this deactivation works.
But Hans and Bojcha know it. )

Nice this filter "Dynamics Boost". Tested DSP (standalone not working)
But again need very precize input level. 40% in most cases is very high (or that's something woth more bass boost?)
Around 25% is somethign what i would set.

Maybe it's better to be before MB (after AGC)

CPU load for the dynamics boost is extreme too. Just enabling that takes me up to 80-85%. Add in Declipper and it's 95-99%, with stuttering audio, inability to do anything else, task manager taking a while to respond, etc...

My CPU load is standard ST output without declipper, dynamic boost or fm output at 9%. Add in any of these does have no effect, its still at 9%. Only driving declipper up to maximum rises it to 22%.

Ok, Brian you know and almost everybody in this forum knows now that you have a very old and outdated computer (CPU).
Hans always does his best to find the sweet spot of audio quality vs. performance.
But it's part of every natural technical evolution, that a software (using advanced algorithms) needs more CPU power for new and additional processing.
The problem is not Stereo Tool !
Your CPU is the problem !

I understand that at the moment an up to date new high performance multi-core system is not affordable for you.
But with a little creativity (to earn some money) it is always possible to buy for a fraction of the cost a second hand system.