I figure out the "Tight" switch of the NUX MG-100 (Cheapest multi effect on the planet) - YouTube
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Amazon.com: NUX MG-100 Multi Effects Processor Bundle with Blucoil Slim 9V Power Supply AC Adapter, 10-FT Straight Instrument Cable (1/4in), 2-Pack of Pedal Patch Cables, and 4-Pack of Celluloid Guitar Picks :