[ame]http://www.youtube.com/watch?v=v6Le6PzMmuI[/ame] Yep it is an octavia type fuzz , not fy-6 superfuzz scheme. The 1st mode with yellow LED is a standard octaveup effect, the 2nd doest 2 octaves up. Got 4 internal trimpots, two per mode. Gain trimpot affects sustain only, Drive trim affects level of overdrive. The 1st mode is gorgeous love it, it does that classic sound. The 2nd is aggressive and spitty. Really cool toy with awesome look.