[sdiy] M-Audio Midisport Uno Wire to pin ?

grant musictechnologiesgroup.com grant at musictechnologiesgroup.com
Sat Jan 14 16:55:23 CET 2023

Coming from the world where MPU-401's were over $500, I don't find $20 for a USB-to-MIDI cable too much of a bother. As others have mentioned there are both hardware and firmware problems in those $5 black case models. For the DIY'ers among us there are at least two open source projects out there where you can solder up your own replacement board and replace the guts.  One is based on an 8051 and the other an STM32.


------ Original Message ------
From: "ShedSynth via Synth-diy" <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
To: "synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>" <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
Sent: 1/14/2023 1:52:04 AM
Subject: Re: [sdiy] M-Audio Midisport Uno Wire to pin ?

Re the video’s complaint that only MIDI IN is opto-isolated: I think I’m right that this is correct implementation (please contradict if not).
The MIDI OUT on any device is actively driven from the device’s own power, and whatever MIDI IN you plug that into will/should be opto-isolated so no ground loop or smoke.

But the video is probably right about the £5 USB/MIDI interfaces not isolating MIDI IN.
Does anybody know any cheap USB/MIDI cables which do isolate?

From: Synth-diy <synth-diy-bounces at synth-diy.org<mailto:synth-diy-bounces at synth-diy.org>> On Behalf Of Nathan Trites
Sent: 13 January 2023 16:26
To: David Messenger <mssngr1 at pacifier.com<mailto:mssngr1 at pacifier.com>>
Cc: synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>
Subject: Re: [sdiy] M-Audio Midisport Uno Wire to pin ?

If you havent sorted this out yet - here is a youtube video where you can see how it's wired: https://youtu.be/Xv5-5CUNFvI?t=75


On Sat, Jan 7, 2023 at 5:14 PM David Messenger <mssngr1 at pacifier.com<mailto:mssngr1 at pacifier.com>> wrote:
I have to rewire the in/out DINs on a Midisport Uno that lost it's midi
plugs. There is one wire that has red-black-yellow and a bare ground,
and then the other cable has just red and white. Anyone know which pins
each of these wires should be reattached to? TY D.

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