These effects are cumulative.
Volume, Gain, Tone for each channel.
Highly luminescent blue diodes ideal for dimly lit scene or in the dark.
Powered by 9v battery or trransfo.
Although the pedal has a pallet of sounds incredible, it's not difficult to find the sound you want, the tone knobs covers a very wide range.
Regarding distortion, we have something fairly fuzzy (but it's still a distortion!), Playing with the guitar volume you can have a very nice crunch, though compressed, pushing the volume (the guitar) is going to mean something more directly, if we increase the gain of the pedal, one reaches a saturation type ultra nasty extreme metal.
Regarding the Overdrive section, we are here in a register rather warm and full, the TS-808, Gorgeous! As one goes from the micro to the big crunch which pleases OD punks. Ideal to give boost to your amp.
And finally for the fuzz, its orientation is in the modern fuzz, the fuzz distortion more access (for a fuzz at the old earn the effect with the overdrive channel of your amp, it is a pure Killing LA), so a incisor fuzz less "soft" as the Dallas Arbiter Fuzz Face and company, it is perfect for alternative rock, solos rock 60's-70's.
While a plurality of channels is as I said possible, so that the possibiltés are even more extensive, I particuliairement couples Disto + and OD + Fuzz Fuzz.
This is an excellent value for money especially for a boutique pedal and more Made in Marseille (Cocorico!? ... Nan)
My only regret is that the fuzz is not enough typed vintage fuzz, but from the designer, adjustments are possible (trimpots?), It says that channel is terrible as distal to the alternator.
Nothing to say for the price it's very good.