Hello there my friends.. I was planning to use a Mesa Boogie studio preamp together with a Ada -mp1 a Mesa 50/50 and a Multi effect unit like a Gmayor 2, there is no problem using the ADA with midi controls but the mesa Studio pre or mesa Bogie studio caliber .50 head or studio 22 combo use 1/4 control to switch channels, reverb ,eq ect,ect.. and wanted to control those channels using a midi device to achieve my goal, so my question is there its such unit on the market that could help me convert the 1/4 signal to midi to make it part of a complete rack system.. thanks you for any advice... 
