Help building simple midi splitter (1 Midi IN / two Midi Out)

Other Hardware General Electronics
1

Hi again,

i have one MIDI-Out socket at my device.
The arduino sends two program.change commands, one on Midi-Channel 1, one on Midi-Channel 2) to this MIDI-Out.

Now i want to connect to devices to this Midi Out. One receives on channel 1, one receives on channel 2.

Can i just solder a MIDI Y-cable?
Or do i need to build one of this MIDI-Thru Boxes containing an optocoupler (GN138) and a hex inverting schmitt trigger (e.g. 74HC14)?

Best regards
Daniel

2

I guess you didn't like the answers in your previous thread Midi Out --> Split into two - Audio - Arduino Forum

But despite that MIDI Thru is still the right way to do it. You can't just parallel connect a Y-cable because MIDI uses current loops not varying voltages. A Y-cable would be very unreliable if it worked at all.

Don't either of the unnamed things you want to connect to have a MIDI Thru socket?

Steve

3

Sorry, i was too silly to find my old thread (shame :wink:

But: I have tested this

https://www.muffwiggler.com/forum/viewtopic.php?t=116823&sid=a1700f93d54f5452294e4e326b065d2a

which works perfect for me.

Greetings
Daniel

4

which works perfect for me.

Then you are obviously not using test equipment to see what a mess you are making with your signal. In technical terms that solution is crap. Typical of the sort of rubbish you find on the internet these days.

5

basementmedia:
Sorry, i was too silly to find my old thread (shame :wink:

But: I have tested this

Splitting MIDI cables - MOD WIGGLER

which works perfect for me.

Greetings
Daniel

And is not MIDI compliant. It might work with some equipment combinations, it might not work with others, it might
work only on hot days with other combinations, or have a high and variable error rate, or suddenly stop working
when it matters most to you. Just bad engineering, don't expect it to be reliable.

6

Hi,

ok...sounds reasonable.
I think i will give it a try for a few rehearsal sessions with my band.
If it generates at least one error, i will switch over to a MIDI Thru Box.

Do you have a link to a schematic of a 1-Midi-In - 2 Midi-Out Thru box?

Best regards

Daniel

7

basementmedia:
Do you have a link to a schematic of a 1-Midi-In - 2 Midi-Out Thru box?

Well we can google things for you if you like: https://moroccodave.com/2017/10/04/diy-midi-thru-box-version-2/