Headphones Sammy boy. PA too of course but prolly asking wee bitty too much of the store there.
Cannot talk with conviction about the Korg but with the Boss I suggest cycling through the pre-sets before messing with anything. This will give a good overal idea of it's capabilities. I think also the pedal is set from new as volume so be warned. Always put some type of wah or anything else on it though.
Also, easy way to edit, ie amp/cab/pedal/effect.
While in a pre-set mode, pres function key and use the wheel to scan through diff. options. If like amp/cab for instance, press distortion switch (bottom left til it blinks) then use scroll wheel to scroll through the diff. pedals and hit button again to say on). Just a quick tip to make it testing easier as is complicated.
