ALM / Busy Circuits is a UK based audio electronics company producing original, useful and fun devices for the creation, manipulation and control of sound. We focus primarily on the Eurorack modular synthesizer format.

To keep updated, please follow us on Twitter and Instagram and visit our YouTube and Soundcloud pages for more demos.

For product support please email help@busycircuits.com For more general enquiries please email info@busycircuits.com

ALM006: S.B.G


The ‘S.B.G’ is a compact utility module intended for the interfacing of guitar effect pedals with your eurorack modular system.

It provides both attenuation and amplification of audio signals for level matching together with a crossfade control to conveniently adjust the wet/dry mix of a processed signal.

The module also offers regulation of outgoing CV signals for safer use of pedal expression inputs.


• Attenuation of outgoing modular audio signal sent to external effects.
• Amplification of returned audio signal to high modular signals 
(approx. 3db to 34db of gain)
• Clipping indication on over-amplification of returned signal.
• Manual cross fade between original ‘dry’ source signal and returned ‘wet’ signal.
• Regulation/conditioning of CV modulation signals intended for pedal expression inputs.
• Includes ‘floating ring’ cable for safe expression input connectivity.
• Skiff friendly
• Designed and Made in the UK

Technical Specifications

Supply: +/-12V (Reverse voltage protection)
Current Draw: ~30ma
Size: 4 HP
Depth: 22mm (including power header)
Effects Pedal Adapter