UMI-1 : USB MIDI adapter

Discussion about old sound cards, MIDI devices and sound related accessories.

UMI-1 : USB MIDI adapter

Postby dreamblaster » 2019-2-03 @ 10:55

Hey,

after getting a few mails asking why I don't make an affordable great working USB to MIDI converter
(those Chinese USB TO MIDI cables don't seem to work well, and roland cables are expensive ??), I decided to do it.

i created a small PCB that converts USB to MIDI (in and out) : UMI-1
This is the prototype, it still needs some changes before releasing.

Some things I could add for the next revision, if it makes sense (not sure) :

add a dip switch for :
- enable/disable running status support. --> is it useful to switch on running status for games ?
- switch between USB DEVICE / USB DEVICE B name in usb descriptor. (allows to use 2 USB MIDI converters at the same time without confusion).

add a second MIDI IN and OUT? (I think not relevant for games ??)

add a 3d printed enclosure



Looking for 1 person in Europe, who likes to try UMI-1's compatibility, and provide feedback.
I will send you an UMI-1 prototype for free, if you like to :
- try with different operating systems (as many as possible)
- try with different MIDI devices.


DSCN0138.JPG


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Visit http://www.serdashop.com for retro sound cards, MIDI PCB's, and video converters
OPL2LPT, OPL3LPT, X2, S2, S2P, MCE2VGA, ... many projects ! Have a look, and thanks for your support !
dreamblaster
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Re: UMI-1 : USB MIDI adapter

Postby yawetaG » 2019-2-03 @ 20:14

dreamblaster wrote:(those Chinese USB TO MIDI cables don't seem to work well, and roland cables are expensive ??), I decided to do it.


Roland's cheapest interface is 30-40 Euro at a large store such as Thomann...you can have an OEM interface for as little as 15 Euro. Other good manufacturers are also all under 100 Euro for 4-8-port interfaces. So I'm not sure if this is worth it for you...

(I must say I fail to understand why paying 30-40 Euros for a known-good USB/MIDI interface is considered "too much" when people regularly pay over 100-150 Euros for GM modules and other hardware... :confused: )

Also, on some OSes you need a driver for the USB/MIDI adapter - it's not merely a question of using a plug-and-play USB-compliant device. To elaborate, it might only work without a driver on Mac OS X, because OS X has an integrated utility that detects USB class compliant MIDI devices. Mac OS Classic needs additional software (e.g. OMS/Open Music System) to be able to use MIDI devices; see https://discussions.apple.com/thread/4968700. I'm pretty sure Windows 9x/NT needs a driver; 2000 likely too; possibly XP and later too (going by how you need to download a driver for most USB MIDI devices from big manufacturers...).
yawetaG
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Re: UMI-1 : USB MIDI adapter

Postby dreamblaster » 2019-2-07 @ 09:19

yawetaG wrote:So I'm not sure if this is worth it for you...


Yeah, I really wanted to do this. So I am happy to have it.
Maybe I stick with these few prototypes, and not sell it. :happy:
Visit http://www.serdashop.com for retro sound cards, MIDI PCB's, and video converters
OPL2LPT, OPL3LPT, X2, S2, S2P, MCE2VGA, ... many projects ! Have a look, and thanks for your support !
dreamblaster
Oldbie
 
Posts: 634
Joined: 2015-1-18 @ 19:34
Location: Belgium


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