I have a A-190-3 USB/Midi to CV interface
( http://www.doepfer.de/a1903.htm) , and recently picked up a A-190-2 Midi
to CV interface ( http://www.doepfer.de/a1902.htm) as well.

I'm hoping to daisy-chain the serial MIDI data between the two modules,
so I can use one MIDI (or USB) cable to my rack, train the 190-3 for one
MIDI channel, and train the 190-2 for another MIDI channel, but only use
a single MIDI cable as input to my rack for both modules.

The Doepfer web site offers an 'excerpt' or single-page of the A-190-3
manual (the "p13" PDF). It has two "jumpers" (dual pins), JP5 for MIDI
OUT, and JP6 for MIDI In. And it looks that a 2-wire cable can be used
for serial transfer like MIDI.


In the PDF for the A-190-2, there is one jumper set, JP5, with only two
pins. It is labeled for both MIDI IN and MIDI OUT.

I'm assuming the serial data used in both devices is raw MIDI
(transmit/receive) as you would see through signal analysis of a MIDI cable.

Is there a recommended approach to use JP5 (MIDI OUT) from the A-190-3
and lead it to only one pin of JP5 on the A-190-2 for MIDI IN purposes

In the A-190-3 PDF
( http://www.doepfer.de/a100_man/A190_3_Manual_p13.pdf) one pin of each
JP5 and JP6 is marked with a 'T' symbol, and this pin is soldered to the
ground plane on the circuit board.

Does the A-190-3 module tie the 'T'-marked pins of JP5/JP6 to frame
ground through the A-100 System cable

Is the frame ground how to make up for the lack of the second wire on
the A-190-2

I am going to try doing a one-wire daisy chain between the A-190-3 out
to the A-190-2. Will it work Has anyone confirmed this

Thanks for any help, and have a Happy New Year!

David