Midi THRU adaptor

[bh@okcforum.osrhe.edu (Bill Hallman)]

Midi through adaptor:

                                               ST Midi OUT
                   v                           connections
                                             1 - THRU data
            3 o         o 1                  2 - Shield Ground
                o     o                      3 - THRU return
              5    o    4                    4 - OUT data
                   2                         5 - OUT return

               midi ports
           looking into port


    To make an adaptor you need:    1 - Male 5 pin din plug
                                    2 - Female inline 5 pin din sockets
                                    2 - short pieces of 2 conductor
                                        shielded cable

    Midi OUT socket         Male plug             Midi THRU socket

           1 NC                  1 -------------------- 4
           2 -------shield------ 2 ------shield-------- 2
           3 NC                  3 -------------------- 5
           4 ------------------- 4                      1 NC
           5 ------------------- 5                      3 NC


     The ST/TT Midi THRU is a copy of Midi in, after passing through an
opto-coupler and a couple of buffers.


Bill