[sdiy] Midi 3.5mm cable

[Quincas Moreira]

That makes no sense...  midi din uses 3 wires, so does a trs minijack. Or
two wires if you skip ground. what avoids ground loops is the use of
optocouplers, and that sits behind the connector, whichever is used.

the module I just made doesn't use shield or ground, because I'm using the
beatstep adaptor which is just TS.  So I used some thermofit to isolate the
jack body from the grounded panel, working fine :)

Quincas



On Wed, Aug 24, 2016 at 8:23 PM, <rsdio at audiobanshee.com> wrote:

> With all of these tiny-key analog synths coming out, I'm not too surprised
> that there are some very popular 3.5mm MIDI connectors.
>
> I don't know what the wiring is, but they'd better use the Shield for
> ground because many panel-mounted 3.5mm jacks are grounded even if you
> don't solder to them. This would require the cable to be directional and
> have telescoping shield from one end and no connection on the other end.
>
> Now that I think about it, 3.5mm MIDI is a bad idea because it might be
> more difficult to maintain classic MIDI's way of avoiding ground loops. For
> plastic cases and cheap gear, it wouldn't be an issue, but for modules with
> metal faces plates, it could really get messy.
>
> Brian
>
>
> On Aug 24, 2016, at 5:15 PM, Jason Proctor <jason at redfish.net> wrote:
> > is there an emerging standard for 3.5mm MIDI? i see a number of compact
> devices implementing it. ideally they'd all work the same way so the cables
> would be compatible....
> >
> > On Wed, Aug 24, 2016 at 3:16 PM, MTG <grant at musictechnologiesgroup.com>
> wrote:
> >> There are a number of people doing this already. Pick the one you are
> happiest with.
> >>
> >> GB
> >
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-- 
Quincas Moreira
Test Pilot at VBrazil Modular
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