Stereo Tool

I have a Pentium 3 on some old laptop but as i remember it crash before run.

Next beta (building now) will have a simplified tilt correction (only 1 slider, as that appears to be sufficient in all the cases I have seen so far). And it will have a separate lowpass frequency setting for FM, AM and streaming output.

BETA751-027

Windows 32 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 51-027.exe
Winamp/DSP plugin: http://www.stereotool.com/download/dsp_ ... 51-027.exe
VST plugin: http://www.stereotool.com/download/vst_ ... 51-027.dll


CHANGES:
- Different lowpass frequency for Stream than for FM/AM.
- Simplify tilt correction
- Declipper --> input --> lowest tilt slider is behaving akward when holding and sliding (could be there for a while, I just noticed) --> See it here as well but I don't see any reason in the code. Not important enough to spend a lot of time on... So I'll keep it as it is for now.


TO DO:
- Add separate volume for 1st and 2nd MPX output.
- Added CPU load display (as text) to the CPU load sliders.
- Fixed broken GUI display in AM mode when in full-screen
- Solved distortion in limiter in lowest multiband bands. Increased range of Limiter distortion slider downwards to 0.2% and filling in default values for them now.
- Exception in: GUI Event Handler (Exception 0xc0000005 at address 0xf5f5b8, read/write=1, r/w location=0x0). Offset-info: 0xeb0c84. Reported by Fario and 2Sense. Unfortunately the crash occurs in a function called __intel_memset and I cannot see where it's called from. (Well, the GUI obviously...)
- Add presets, and remove a lot of older ones
- Improve web interface further. -> Postpone, can be done together with hardware GUI development. (very soon, among others preset selection)

OLDER:
- Disable Delossifier at lower latencies
- Optimize Delossifier
- Add Bass Boost reference level (boost at input, reduction at output) "Drive"
- Make DIFF work for all pre-limiter settings.
- Assigned unique ID's to built-in presets, to make it much easier to add, remove and shuffle presets (which used to be tedious and error prone).
- Exception when switching between built-in or external presets. To be tested with DEBUG version. Hm... not reproduced anymore.
- Added warning about that it's better to use ASIO, plus that if you don't you need to set the sample rate correctly in Windows.
- Pre-limiter behavior redesigned. Sliders added and visual added.
- Audio drop in FM output with Tilt correction enabled (which was caused by the clipper!) solved.
Latency 4096 + 1024 bands in pre-limiter sounds good again.
- Fix RDS clock on 64 bit
- Add visual to show Pre-limiter effect.
- Check Pre-limiter to see if I can improve how it works, or make it more logical / easier to setup.
- Stokkemask in strict mode (checkboxes for 'skip smoothing' and 'sloppy smoothing' disabled) is *slightly* less strict than before, but the sound quality is improved a lot (effect on the audio of the Stokkemask filter is reduced by more than half).
- You can set Strictness (CPU) to 3 instead of 2 as maximum. 2 should normally be sufficient though, and it's the default setting.
Stokkemask CPU load optimized for all settings.
Bug in Stokkemask and Multipath Clipper fixed that makes it work better.
- Added faster processing paths for SSE3, SSE4.1/2, AXV and AVX2.
- Optimized Stokkemask filter (so far only in Faster mode, will optimize the other modes later). Filtering is slightly less good, although I don't see it in the measurement results.
- Changed band steepness minimum values for multiband from 6 to 3 dB/octave. (Ooh. I hope i changed MB and not ND...).
- Added a bunch of new presets. Some need to be updated again. And the Jeroen Platenkamp HvZ mod version is currently identical to the original.
- Web interface drawing of equalizer fixed
- Crash when loading some presets fixed
- Bug fix: Prelimiter acted up at certain latency settings.
- Web interface dragging fixed.
- Bug that caused sliders and top menu to stop working fixed.
- Calculation of FM MPX left/right peaks was wrong when using Composite LIMITER, fixed.
- Made left/right display green (with above 100% yellow) as suggested by mpex2006km.
- Improved web interface a lot more ("1000" is gone, more displays are working, right part of display auto-scales to device width)
- Fix MPX Power calculator
- Fix resetting of tilt calibration when loading a preset
- Add volume meters which show > 100% modulation for IBC demo
- Bug fix: Single-channel file in plugin version caused crashes when using the composite clipper.
- Compressor/limiters: Moved limiter before compressor. This slows down the attack speed when limiting occurs, which gives a more stable sound.
- Improved web interface. (Not yet finished).
- There's some weird sound audible when you enable 'DIFFERENCE' mode. Even if nothing happens. This means that the audio is somehow damaged. It's worse at lower latency settings. FIXED
- Make highs clipping level configurable. DONE
- Fix composite clipper mode. DONE
- See a few posts up. I've now added 2 sliders that can be used to reduce the effect when there's not clearly a tone present. Tones only reduces the effect when there isn't a single tone that clearly sticks out - basically it checks how loud the strongest band is vs. the total of all bands, and adjusts the effect based on the result of that calculation. Since there are almost always also other tones present, setting this too high will even reduce tones that do clearly stick out. Tones threshold can be used to turn the filter off completely if there isn't a single tone that clearly sticks out (it makes the slope of the Tones only effect steeper).
- Changed some things back to how they were in version 005 - Bojcha reported (and I confirmed) some weird artifacts in version 006. If you enable METHOD2 you get the 006 behavior, that's for my own tests and I will remove METHOD2 later.
- Added Smother filter. The higher you set it, the more it will ONLY affect the loudest sounds. If you have multiple loud tones (for example a bass and a loud voice), setting this very high might cause only one of the two to be effected - setting it very low will affect everything though.
- Added multiband pre-limiter/phase optimizer to the Advanced Clipper.
- Trying a different multiband limiter in the Advanced Clipper. This time without phase optimizer. I'm very curious which version you guys prefer!

2nd MPX output ?
where it is ?

Next version. You'll get a separate volume slider for the 2nd MPX channel. So you can connect 2 different transmitters which require different input levels. For now no separate tilt setting yet...

This mean second sound card , right ?
If so , we can control the volume via her own windows slider .
Or may be i can`t realize the meaning of 2nd MPX output very well yet.

No same sound card. You can use 2 channels ('left and right') which would currently get an identical signal. On top of that, the sound card volume control is often not precise enough.

Oh, yeah. I see now.
I know for the left and right channel are identical and nevermind what you plug in , you get MPX signal . So i now understand , you will make them to be separately volume controled. This is clear now and is good one.


And i see some exeption for GUI like you said. May be it`s related to what i report long time ago for the "MPX power meter" (white) when you disable the FM transmitter and enable the AM one. This meter is positioned badly or it`s a bug to appear at all?
You can fix this one before release.

Dear Hans,

For your next update, can you take a look in the PTY code. Tonight I played around a bit. But with most codes my Sony ST-SB920 gave a other PTY then I added in the software.

For example oldies is given Rock Music

Further more I would be happy with the two mpx outputs! Is use them at the moment already but the slider would be very nice.

Keep up the good work!

Regards,

Michel

Sounds like you have the wrong setting for pre-emphasis. On US radio's (75 us pre-emphasis) the code for Oldies is Rock music for other countries.

You might have done this to boost the highs... If so, adjust the preset instead.