Back to overview Documentation version 9.23
- Changed overlaps in measurement.
- Measuring more often.
- Using L-R reduction in early stages, total level reduction in final stages.
- Updated Gaussian window sigma value.
- Using more stages overall.
It's also much heavier so legacy mode can still be used.
Measured effect of the old vs new Stokkemask filter on audio with extreme stereo content at +9 dB MPX power:
Sound card buffer could be filled too much until you did a RESTART SOUND CARDS.
Until now, they were compensated for the distance between bands. That might have been useful for some situations,
but made it harder to recreate the sound of other processors.
changed default setting to 6 dB (instead of 13). This reduces the effect of ND if the input signal is more dynamic.
Caused by differences in calculation results between Intel/AMD and ARM CPU's.
potentially also in other versions depending on what CPU is used.
Time zone changes ignored after startup on Windows (compiler runtime bug).
Possibly bug in Audition or compiler.
With this, latency can go down to 128 samples (5 ms analog input to analog output).
AGC: "Compatibility & behavior" header
"Bass AGC (Old)"
"Classic Multiband Compressor"
"Pre-limiter (no longer needed since Leif's clipper improvements)"
Advanced Clipper: "Highs gap protection" heading (replaced by Leif's gap protection)
Leif's clipper efficiency modification checkbox (overruled by Leif's clipping strictness)
Composite clipping Strictness (CPU) checkbox
Phase rotation: "At start of processing" checkbox
All Singleband and Multiband "Compressor type" (Analog/digital) pull-downs
Multiband and Natural Dynamics Flat Frequency Response "Compatibility mode (bad)" checkbox
Advanced Clipper: "Smooth slope" setting (under Distortion)
Advanced Clipper: "Upsampled highs clipping (useless)" setting (under Distortion)
Advanced Clipper: Stokkemask: "Force Stokkemask even if not using Composite Clipper (bad for audio)"
BS412: "De-basser non-ITU.1770 compatibility mode (bad)" checkbox
Huge (upto 45%) total CPU load reduction, improved clipper audio quality.|
Keywords: Attack, release, release hold, ratio, feed forward vs feedback, lookahead, burst protection.
Set 0.25 kHz above actual LPF freq, but never below 16 kHz.
Cleaned up unused code:
Values up to 4.00 are now allowed.
Loud highs now have far less effect on the loudness of the other sounds - so it sounds much more stable.
Added a filter to improve trumpet sounds.
Improved quality and loudness of deep bass sounds.
Also the filtering quality is now much better - the spectrum above the filtering frequency is now really empty.
The CPU load is about 5-10% higher than that of version 3.40 - measured using the FM Loud preset.
The CPU load is roughly identical to that of version 3.30 in Low and Normal quality mode as long as the composite limiter oversampling is not used. And it will be a lot slower on PC's without SSE2 support.
Composite limiter added. Gives about 7% (0.5 dB) extra loudness on FM transmitters, without affecting the FM Pilot and RDS signals.|
Memory footprint reduced by about 12 MB (3.29 used 34 MB, 3.30 uses 22 MB)
Bug fix: Lowpass filter filtered at the wrong (too low) frequency when using high (> 60 kHz) input samplerates.|
Small (6-10%) performance improvement.|
Improved Final limiter filter: More stable output.
Added Highpass filter to filter out low rumbling sounds (especially useful when playing from vinyl) and sounds that may interfere with FM stereo transmissions.
Added VST plugin version (beta!).
Huge performance improvement (48% faster than 3.26 - although still 6% slower than in versions 3.21 and older versions).|
Improved Final limiter filter: More stable output.
Improved Loudness filter: Switch ("++") available to choose between loudest possible sound (same as in older versions) or slightly less loudness with much better sound quality.
Improved Loudness filter: Distortion caused when a large amount of high frequencies was present (mainly FM pre-emphasized sounds) is reduced.|
Improved Loudness filter: Removed edges in the sound.|
Updated FM presets for a more stable (less pumping) sound.
Improved Loudness filter: Reduced pumping for loud bass or hi-hat sounds at high Loudness settings.|
Spoken text for unregistered versions increased from once every 24 hours to once every 12 hours.
Pop-up added requesting to register (shown only once every 30 days).
Redesigned Loudness filter processing: Same volume and clarity as older versions, but with quality of 3.22.|
Far lower CPU usage for loudness filter in High Quality mode.
Redesigned Final Limiter and Loudness filter for better sound quality. Suggested new setting: 0.01 s.
Improved Loudness filter processing: Much less distortion.|
Increased maximum Loudness setting from 1.75 to 2.0.
Bug fix: Loudness filter in High Quality mode caused a slight phase shift. Resolved.
Improved Final Pre-limiter: More powerful highs for FM pre-emphasized sounds.|
Improved Loudness filter processing: Better highs.
Increased maximum Loudness setting from 1.5 to 1.75. Warning: Values above 1.5 cause some distortion for loud sounds. Only use it for sounds that don't often peak to the maximum volume.)
Changed presets for more punchy sound, Radio presets also for more punchy bass.
Bug fix: (De)selecting Low Latency no longer causes continuous static.
Stand-alone version: Added ASIO support for lower latency (10 ms microphone-to-speaker without processing). ASIO is a trademark of Steinberg Media Technologies GmbH|
Added low latency processing mode (200 ms latency with all processing enabled).
Improved sound quality for bass sounds (multiband compressor, stereo image filter).
FM pilot tone and RDS signal volume can be adjusted.
Bug fix: Linked sliders (up speed, down delay) now remain linked properly.
Stand-alone version: Fixed a bug that caused crashes.|
Stand-alone version: Fixed a bug that caused strange sounds on non-SSE2 machines.
Stand-alone version: Fixed a bug that could cause continuous hiccups in the sound when the CPU load was very high (unlikely).
Added more feedback on sound card problems: A red bar now indicates an error.
Improved the performance of the FM pre-emphasis filter.
Fixed a bug to support 32/64/128 kHz input for FM transmissions.
64/128 kHz input is now processed at 32 kHz if "Process as 44.1 kHz" is enabled (previously 64 kHz). This reduces the CPU load.
Improved sound quality for FM transmitters (brighter, better highs).|
Save bug which caused Stereo Tool to keep starting up in simple mode fixed.
Fixed a bug which made it impossible to select Windows Audio Mapper as output device.
Fixed a bug that could cause Stereo Tool to produce silence when leaving Simple mode, restart was needed.
Stand-alone version added.
Added ability to change Stereo Tool settings while running from external scripts.|
Minor bug fix during saving of STS file.
Re-added Channel Delay fake stereo filter (now part of the Stereo Image filter).|
Fixed STS load file bug which could cause some values not to be refreshed.
Fixed STS load bug in Basic mode which could cause the sound to drop to silence.
Direct soundcard access, bypassing Winamp limitations, to make broadcasting FM stereo and RDS easier.|
Up to three different output channels: Normal processing, FM stereo and RDS signal, and low quality low latency signal for listening in while broadcasting live.
RDS support: Added PI, PTY, RadioText, ClockTime, M/S, TA, TP, Stereo, Compression, Artificial Head.
Improved sound quality (slightly warmer sound for certain types of sounds.). Presets use a lower Pre Amp value for better results.
Added a noise gate (noise removal) filter. (Removed Channel Delay to make room for it.)
No more low or high pitched sounds when changing to a lower or higher sampling rate.
Solved problem that could cause hiccups in some rare circumstances.
Added Speech preset, updated other presets to use the noise gate filter.
Added Basic interface for easier control than the (original) Advanced interface.|
Improved Compression (Loud) presets (better sound quality).
Solved a bug that could cause Winamp to crash when Stereo Tool was closed very quickly after opening it.
Improved performance on AMD CPUs.|
Improved FM transmitter presets (better sound quality).
Bug fix: Startup problem in SAM4 solved. This bug may have caused other problems as well.|
Greatly improved performance using hand-optimized SSE2 code.|
Added dualband pre-limiter.
Increased number of multiband compressor channels from 8 to 10 for deeper bass sounds.
Added multiband clippers for a more stable sound with less remaining peaks.
Added multiband "feedback" loop which feeds the total output volume back into the multiband compressor, to enable better control of the maximum output volume.
Added multiband compressor HQ mode for much better bass quality.
Added multiband post filter for improved sound quality, when using agressive multiband compression settings.
Added possibility to limit the maximum phase difference between the two channels in the stereo image filter.
Added a 3-step final limiter to enable creating a completely flat output level without pumping or distortion.
Added a "loudness" filter which can make audio sound up to 5.5 dB louder without generating louder peaks.
Added FM stereo encoder for FM transmitters.
Added RDS encoder for FM transmitters (still very limiter in this version).
Added vertical scrollbar for small displays.
Added bypass mode: When iconified, right-click on the Stereo Tool icon to turn it on or off.
Updated the presets to make use of the new features.
Removed singleband compressor.
Removed "normal" interface, only simple and extended are left.
Bug fix: Clipping problem in 24 bit audio solved.|
Added single bass speaker mode. This solves bass sound cancellation issues if a single bass speaker is used.|
Added an automatic phasing (azimuth) detection and correction filter. This improves the sound of some recordings (including many cheap CDs with old music) and tapes. Bug fix: "libguide" conflict with other plugins and SAM4 MP3 output resolved.
|2006/10/03||v2.05||Bug fix: Presets pulldown menu now functions properly on all Windows versions (many thanks to Bob Evans for telling me how to solve it!)|
|2006/09/12||v2.04||Bug fix: Stereo Tool now correctly displays the output bars also when the Windows font size has been changed.|
|2006/09/07||v2.03||Sound quality improvement: Improved handling of very low frequencies. The rumbling sound that was sometimes present in older versions is now almost completely eliminated.|
|2006/06/13||v2.02||Bug fix: Stereo Tool now also supports non-32 bits displays. 32 and 16 bits displays are supported in color, others in black and white.|
|2006/05/26||v2.01||Fixed a bug that caused Stereo Tool not to be recognized correctly by SpacialAudio software such as SAM3 and the Winamp DSP Stacker plugin.|
Added a lowpass filter.
Added Load, Save and Reset button functionality.
Added minimize/iconify option, and startup minimized setting.
Added 8, 24 and 32 bits audio support.
Added different interfaces (simple, normal, extended).
Added multiband limiter/compressor slider.
Added singleband limiter/compressor slider.
Added a channel delay slider, for fake stereo.
Greatly reduced CPU usage, SSE2 support for P4 added.
Added sound quality setting to further reduce the CPU usage.
Output displays are now drawn on screen as bitmaps instead of progress bars. This gives better results, especially on Windows XP.
Increased the down speed setting range, changed the way these values are displayed.
Settings are now saved in the default INI file directory instead of C:\ .
Added a help website instead of the old text file.
|2005/10/02||v1.12||Extremely high CPU load problem fixed, could (at least theoretically) occur on some Winamp versions or with some audio formats.|
|2005/09/27||v1.11||Lockup problem fixed, when "stop" is pressed in WinAmp lockups should not occur anymore.|
|2004/11/16||v1.0||Initial unreleased version|