The Mosky Roller Compressor is a compressor pedal from the maker's M-SERIES range, built around four knobs: SUSTAIN, BLEND, LEVEL and TONE, plus a 4-mode selection knob. The Blend control is the notable feature, letting you mix compressed and uncompressed signal instead of committing to full compression1.
The controls
| Control | What it does |
|---|---|
| SUSTAIN | Adjusts compression ratio and increases sustain. Mosky notes that higher sustain settings will create noise when not playing. |
| BLEND | Adjusts the mix of compressed and uncompressed signal. Full left for a 50/50 blend, full right for full compression. |
| LEVEL | Adjusts for gain lost to compression or blend. Set to unity or turn it up higher for a boost effect. |
| TONE | Adjusts the brightness of the output. Turn right for brighter. |
The SUSTAIN knob sets how hard the circuit compresses, and Mosky's own note is worth reading before a gig: higher sustain settings will create noise when not playing1. Pairing the pedal with a noise gate is one way players deal with that.
The BLEND knob is what separates this design from a simple one-knob compressor. Because you can run a 50/50 mix, the uncompressed part of your signal keeps its attack while the compressed part adds sustain, and you can dial toward full compression when you want it1.
LEVEL compensates for the volume lost to compression or blending. Mosky suggests setting it to unity, or turning it up higher to use the pedal as a boost1.
Power and size
The Roller Compressor runs on a 9V DC supply with a center negative plug, the standard for pedalboard power supplies1. It weighs 300g, so it takes up little room on a board1.
Where it sits in Mosky's range
Mosky builds several compressors, and the Roller's blend-and-tone layout is its distinguishing feature. Other compressors in the range include the Mosky Dyna Compressor, the Mosky Dynamic Compressor, the Mosky MINI C4 COMPRESSOR and the MOSKY Compressor. For a broader look at how these circuits differ, see the compressor pedals type page1.
Videos
Guitarrista Sincero
Questions
Is the Mosky Roller Compressor true bypass?
Yes. Mosky lists the Roller Compressor as true bypass, so when the pedal is switched off your guitar's signal passes through without the compression circuit in the way. That helps keep your clean tone unchanged when the pedal is not in use.
What power supply does the Mosky Roller need?
Mosky specifies a 9V DC power supply with a center negative plug, the same standard used by most pedalboard supplies. Use a regulated pedal supply rather than a generic adapter, and note the page does not list a current draw or battery option.
How big is the Mosky Roller Compressor?
Mosky lists a packing size of 147 mm wide by 78 mm deep by 7 mm high and a weight of 300 g. That makes it a compact pedal that fits easily on a crowded pedalboard.
What does the Blend knob do on a compressor pedal?
The Blend knob sets the mix of compressed and uncompressed signal. On the Roller Compressor, full left gives a 50/50 blend and full right gives full compression. Blending in some dry signal keeps attack and dynamics in the sound while the compressed part adds sustain.
Sources (1)
- ROLLER COMPRESSOR_M-SERIES_Products_mosky pedal, moskyaudio.com
