if these are effects supported by DSP hardware on the card, i'd think that either effect would have the same options for midi control as the other.....i'm not sure if the soundblaster has midi effects, but there are plug in midi effects available....you can use a midi echo on a midi track which operates on the midi info, not the audio....i'm sure that there is a midi chorus effect too.....i don't think a midi reverb would work....however, i'm not sure that this applies to the SB....are the chorus and reverb both audio effects,,,,,,they work on the audio not the midi?