Even with the MOD DUO CPU below 75% the recording of the shared sample presents pops and clicks because the CPU peaks above 92% while recording the sample. Two outputs pedalbord. You can choose to go a real AMP (out 2) or to a Direct Input (out 1). The "out 1" tries to emulate clean tube amp and cab. The "out 2" has only a reverb and a very subtle slap back delay. I have a booster and a overdrive pedal before de MOD DUO for the dirty sounds.