Roland System 100M ADSR clone
http://www.frequencycentral.co.uk/?page_id=827
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Frequency Central System X Envelope, used, well built from a kit. This one has a custom etched steel panel (see photos)."Frequency Central System X Envelope is based on the EG found in the Roland 100M, albeit optimized for the Eurorack modular format. Frequency Central have implemented a range switch for alternating between fast and slow responses."
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