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SLM2
Manual
TBProAudio 2018
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1
Introduction
Welcome to SLM2, a smart stereo loudness maximizer including “analog spice” and 16x
over-sampling.
The goal of the design was to maximize the loudness of the audio signal while maintaining
transparency.
2 Features
SLM2 offers following features:
highly transparent brick-wall-limiter
saturation of input signal
fully control of attack and release
switchable look ahead
switchable saturation
2 limiter modes
additional drive/clip stage
stereo link
over-sampling, up to 16x
easy to use GUI
preset manager
large and accurate live meters
supports all sample rates
Note: This plugin adds latency to the audio path, which is usually compensated by the DAW
(PDC).
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3 Design
SLM2 lets you reach the maximum possible volume with minimal sound degradation.
The SLM2 DSP analyses every sample of the incoming stereo signal within a defined time
frame and calculates the optimal volume increase. This guarantees maximum possible
transparency.
The overall loudness can be further increased by the following, optional clipper stage.
Signal aliasing can be reduced by enabling over-sampling.
SLM2 is used in all limiting situation like track/bus and master limiting.
4 Minimum System Requirements
Windows XP SP3 or newer
Mac OS X 10.5 or newer
Win: 32/64 Bit VST, 32/64 Bit VST3, 32 Bit RTAS, 32/64 Bit AAX
OS X: 32/64 Bit VST, 32/64 Bit VST3, 32/64 Bit AU, 32 Bit RTAS, 32/64 Bit AAX
tested with: Cockos Reaper, Steinberg Cubase/Nuendo/Wavelab 6/7/8/9,
PT10/12/2018, FL Studio 12.x, Studio One
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5 Plugin Controls
5.1 Preset Management
Preset menu loads and saves user presets. Presets stored to %localappdata%/SML2
(Windows) or /Users/xxx/Library/Application Support/SML2 (Mac OSX) are imported as
user presets. Prev and next button step trough all presets. Preset menu lets you store default
settings.
5.2 Gain
"Gain" controls the input stage of the brick-wall limiter. Please to note that the input stage
adds a small amount of saturation for “analog spice”.
0 – 24dB, default 0dB.
5.3 Attack
"Attack" controls how much of the transients are passed to the internal clipping stage. Higher
values make the signal more clipping.
0 – 1000ms, default 0 ms.
5.4 Release
Release time controls how fast the limiter recovers to the constant gain after a peak is
detected. Depending on application different release times can be used.
0 - 1000 ms, default 0.0 ms.
5.5 Saturation
Enables gain depended saturation.
5.6 Auto Release
“Auto Release” calculates constantly the release curve depending on the audio material.
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5.7 Over-sampling
Incoming signal could be over-sampled up to 16 times. As SLM2 uses highest quality
up/down-sampling algorithms for low aliasing operation significantly more CPU resources
are used.
5.8 Look-Ahead
"Look-Ahead" controls the length of the time window of the signal analysis. Longer time
window ensures less sound degradation.
Short/long, default short.
5.9 Limiter Mode
"Norm" is the standard limiter mode, while “Smooth” enables extra anti-clipping function.
Norm/smooth, default norm.
5.10 Drive Clipper
SLM2 has a second gain stage with a clipper. It can be used to increase loudness even further.
0 - +24 dB, default 0.0 dB
5.11 Channel Link
If set to 100 % the gain reduction is calculated from highest peak of both stereo channels, set
to 0 % both channels are processed fully independent.
0 - 100 %, default 100 %
5.12 Ceiling
Ceiling sets the maximum level output signal can reach.
-24 - 0 dBFS, default 0.0 dB
5.13 Meters
Meters for input signal (L/R Input), output signal (L/R Output) and gain reduction (L/R GR).
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6 Demo mode versus Registered mode
In demo mode (without registering) the plugin mutes audio every 90 seconds for a short
period. This could be circumvented by clicking on the "SLM2" logo within 90 seconds.
You can register at http://www.tb-software.com\tbproaudio.
7 Activation
After purchasing the license key, unpack the key to a convenient place on your PC (e.g.
desktop). Add the plug-in to any track, click on the “Demo: Click here to activate” text and
select the key file. Remove the plug-in and add it again. The GUI shows now “Registered to
your name”.
8 Conclusion
So finally if you have any questions or suggestions just let us know. And have fun with our
tools.
Your team from TBProAudio :-)
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