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(C) TBProAudio 2018 

Page 6 of 9 

 

absence of phase shifts is guaranteed. Placing several instances of Impress in series gives a 
flexible multiband compressor.  

 

ChanSel (Channel Selector): stereo (default), left, right, mid+side, mid, side 
 
MB (Multiband): off, on (red light) 
 
LC (LowCut): sets the lower limit of mid band, 1 - 22049Hz 
 
HC (HighCut): sets the higher limit of mid band, 1 - 22049Hz 
 
Slope: sets filter steepness, 24dB/Oct - 192dB/Oct, in 24dB/Oct steps 

6.4  Detector Selector 

This control selects which plugin input is routed to the detector signal stage. 
Channel 1+2 of the plugin are always routed to the main signal stage. 
Channel 1+2 could also be routed to detector signal stage (normal operation). Or channel 
3+4/Side-chain could be used as detector signal. In this mode the level detection of the 
compressor is controlled by a different signal then the main signal (side-chain effects) 

 

Det Input (Detector input): Main (channel 1+2), SC (channel 3+4/side-chain) 

6.5  Detector Signal Stage 

Before the signal form channel 1+2 or 3+4/side-chain is routed to the detector input of the 
compressor parts of the signal can be selected. Additionally the signal can be filtered in order 
to let the level detector focus on a specific part for the spectrum. 

 

ChanSel (Channel Selector): stereo (default), left, right, mid+side, mid, side 
 
Flt (Filter): off, on (red light) 
 
LC (LowCut): sets the lower limit of the filter, 1 - 22049Hz 
 
HC (HighCut): sets the higher limit of the filter, 1 - 22049Hz 
 
Slope: sets filter steepness, 24dB/Oct - 192dB/Oct, in 24dB/Oct steps 

Summary of Contents for Impress

Page 1: ... C TBProAudio 2018 Page 1 of 9 Impress Manual TBProAudio 2018 ...

Page 2: ...ical decisions right 2 Features Impress offers following features zero latency click free 64 bit internal processing low aliasing compressor design real oversampling up to 8x stereo left right mid side processing external side chain main signal multiband filter up to 192 dB Oct Linkwitz Riley design detector signal pre filter up to 192 dB Oct 2 compressor modes classic and clean low aliasing 3 gai...

Page 3: ...n vintage mode with a thermal noise emulation The knee function is optimized for low aliasing operation Multiband Filter The main signal could run through a multiband filter stage The signal is split into three frequency bands the mid band feeds the compressor the output of the compressor is mixed with the low and high band again The multiband filter is based on the Linkwitz Riley design up to 192...

Page 4: ...rates 5 How to use Impress is designed to reset all internal measurements if significant parameter changes are made This keeps all displays updated Impress uses various graphical elements to control the parameters of the plugin Value button Mouse click and drag up down changes value of the parameter Mouse double click opens value input box Mouse shift click resets value Mouse wheel increments decr...

Page 5: ... output original main signal main signal filtered by multiband filter output of compressor not mixed with low high band of multiband filter original detector signal detector signal filtered final output signal of Impress plugin 6 2 2 Oversampling Main and detector signal could be oversampled up to 8 times As Impress uses highest quality up down sampling algorithms for low aliasing operation signif...

Page 6: ...r signal stage normal operation Or channel 3 4 Side chain could be used as detector signal In this mode the level detection of the compressor is controlled by a different signal then the main signal side chain effects Det Input Detector input Main channel 1 2 SC channel 3 4 side chain 6 5 Detector Signal Stage Before the signal form channel 1 2 or 3 4 side chain is routed to the detector input of ...

Page 7: ...in 0 1dB steps 6 6 5 GainStage Type Modern Classic digital gain stage design Vintage Analog gain stage with thermal noise emulation Vintage C Analog gain stage without thermal noise emulation 6 6 6 Ratio This controls the compression ratio in the region above threshold 1 inf limiter in 0 1 steps 6 6 7 Knee Adjustable low aliasing soft knee knee starts x dB below threshold and ends x dB above 0 24d...

Page 8: ... 001ms steps 6 6 14 Max Gr Limit maximum gain reduction This is very useful for vocal compression just to avoid over compression 96 0dB in 0 1dB steps 6 7 Meter Meters for main signal Inp detector signal Det output Out and gain reduction GR LED signal meter range is from 60dBFS to 12dBFS in 3dB steps LED gain reduction meter is from 60dB to 0dB in 3dB steps Value below meters show maximum value If...

Page 9: ...0 secs You can register at http www tb software com tbproaudio 8 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 9 Conclusion So finally if you have any questions or s...

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