my digitech rp250 has Sustain, Tone/Attack, and Compressor Level. the Tone/Attack controls Tone if using digitech compressor, or Attack if emulating Boss CS-2.
so my questions are:
why do i want to use this? what effect does it have on the sound, specifically harp sound. i understand compression in general.
how would you set those parameters for what type of effects? would you set things differently in different circumstances?