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Comp 609 (iOS)

Comp 609 (iOS)

Charge More!
This App is insanely good. It is exactly what I needed - it reacts and sounds like a real life studio rack compressor. And so easy to use! Thank you.Jamie Mal (UK, App Store)

Comp 609 (VST, AUv3) v2.0.3
Comp 609 (VST, AUv3)
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Red Rock Sound Comp 609 recreates sound of the hardware compressor from ’70s. This dynamics processor packs a recognizable musical punch heard on countless records around the world. 


  • 6 Attack, 9 Recovery (Release) and 5 Ratio selections;
  • External Sidechain and Sidechain signal High-pass filter;
  • 4 operation Modes: Stereo, Mid-channel, Side-channel, 2-Mono;
  • Parallel compression;
  • HQ-mode (4x-oversampling) and 64-bit floating point processing.

Compressor section

  • Threshold determines how much compression will occur. When the input signal exceeds the Threshold level, the compressor engages. A smaller value results in more compression. The available range is from -20 dBu to +12 dBu;
  • Attack determines how fast limiting will engage when the signal exceeds the limiter Threshold. The available values is from 1 to 6;
  • Recovery (release) is the time it takes for the compressor to stop processing after the signal drops below the Threshold value. The available values are 40, 80, 100, 400, 600, 800, 1000, 1500, 2000 ms;
  • Ratio — this control determines the compressor ratio. The available values are 1.5:1, 2:1, 3:1, 4:1 and 6:1;
  • Sat. On — this toggle switch enables the Analog Saturation. The saturation has no effect unless this switch is in the «On» (down) position.

Master section

  • SC-Filter — the Sidechain Filter controls the cutoff frequency of a low-cut filter on the compressor control signal sidechain. The available range is 30 Hz to 240 Hz and Off.
  • Input Gain controls the signal input level to the plug-in;
  • Makeup control increases the signal level out of the compressor to compensate for reduced levels as a result of compression. The available range is -20 dB to +20 dB. This control does not affect the amount of compression;
  • Mix — the output balance between the signal processed by the plug-in and the original dry source signal can be adjusted with Mix control. Mix facilitates parallel compression techniques without having to create additional routings in the DAW;
  • Comp. In — this toggle switch enables the compressor. The compressor has no effect unless this switch is in the «In» (down) position;
  • SC — this button activates Sidechain (№3+№4) inputs. A compressor with a Sidechain input controls gain from Main Inputs (№1+№2) to outputs based on the level of the signal of the Sidechain inputs;
  • Mode — compressor can operate in 4 modes: Stereo, Mid-channel, Side-channel, 2-Mono. This switch determines the active mode;
  • HQ — this button activates 4x-oversampling (note that when the HQ mode is on, CPU will be loaded more than usual).


  • Double click — reset to default value;
  • Shift — reduce knob/fader sensitivity.

Reviews and Ratings

Just got the Comp 609 today and it's amazing... one of the very best comps I have out of too many!123steve (Gearslutz)

I have the IK version which I love. Maybe I’m weird, but I like to have two versions of each type of vintage comp for variation.melodic dreamer (Gearslutz)

I seriously hope they do more compressors in the future and eqs. The price is great so is the sound. You can't beat the kind of bang for your buck. I'll stay a customer.trevon (Gearslutz)

Charge More!
This App is insanely good. It is exactly what I needed - it reacts and sounds like a real life studio rack compressor. And so easy to use! Thank you.Jamie Mal (UK, App Store)

Not bad at all
Good stuff you guys are making.IamShazamm (USA, App Store)

Nice one.
RRS make great plugins.jolico (forum.audiobus.us)

I’ve tons of compressor but RRS apps are must buy.
It gives some color to the mix definitelyCharlesalbert (forum.audiobus.us)

Just purchased. Its excellent. I literally emailed the devs 2 weeks ago asking if they could do a compressor app. Never heard back and wow surprise. All RRS plugins are very good. Cheers Whitestormbeats (forum.audiobus.us)

This is exactly how a compressor should sound on a Master or Bus channel. Sounds very analogue and real. Smooths the peaks and retains the transients. Keeps my mix open. Adds glue to the mix. RRS are for sure the “Waves plugins” of the iOS platform. Well done to the devs.stormbeats (forum.audiobus.us)

I have access to the Neve hardware unit, and this sounds pretty comparable! Not bad for a $5 plugin.shinyisshiny (forum.audiobus.us)

Sonically Great!
Don’t hesitate on this app, it works and sounded great. The interface is easy to use and very punchy as advertised.Jhomsombath (USA, App Store)

They're all great
Get them all!anickt (USA, App Store)

Очень хороший компрессор без экстремальных значений степени сжатия, подходит как для вокала, так и для инструменталки. Нормально работает и на подгруппах.rusbroadcast (Russia, AppStore)