The Utopia is a tape echo plus modulation effect. The Utopia can give up to 600ms of echo/delay times. Three knobs - Delay, Repeat, and Mix - give you control over the parameters of the echo effect. The Mod toggle switch kicks in a modulated signal. With the internal trim pots, you can dial in the modulated depth, rate, and tone. Also, with an internal switch you can up the standard 400ms delay time to 600ms of available delay time.