Hi knappo, what I have purchased, is a Zoom 505/II guitar effects pedal and I find that quite good, all effects are programable, delay reverb etc..... as a harp player myself i have found it is good. you just have to muck around with it, if the effects on there are not quite what you want. if you know a good guitar shop, get down there and ask to try one out. good luck. patches.