Lab #55 - Envelope Filter

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2022-01-18: Have a look at our Ottawa-Wah, the production model of this lab series. Finally, an Auto-Wah in the GUP Tech catalogue. The DOD440 Envelope Filter is the classic Green pedal of old school boards. Here's the GUP tech Lab series based on that cool old pedal. This one is inspired from the Reissue with the UP/Down emphasis toggle. The LVL is the threshold detector and the Range is the wideness of the oscillation. Power consumption : 6mA Voltage : 9Vdc only, center negative Show more