The Complete Guide to Choosing a MIDI Controller

Pro Audio Files: MIDI controllers have been around since the protocol was developed by Dave Smith and Ikutaru Kakehashi in the early 80’s (source). The connections were made via DIN-style connectors with IN, OUT and THRU connections being typical. The THRU output allows messages received via MIDI IN to be sent through unchanged so that multiple devices can be daisy-chained.