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 Forum index » DIY Hardware and Software » Arduino
USB MIDI to Legacy MIDI via Arduino
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adnauseam



Joined: Mar 27, 2013
Posts: 142
Location: Manitoba, Canada

PostPosted: Fri Jan 10, 2014 9:00 am    Post subject: USB MIDI to Legacy MIDI via Arduino Reply with quote  Mark this post and the followings unread

So check this out:

Interfacing MIDI devices with Arduino using USB Host Shield

With a bit of fiddling you could potentially look at MIDI data coming from any USB only MIDI device and adapt it to sent standard midi out to any other device. This means you could use your korg nano products, usb only midi controller, perhaps even the OP-1 as a device for legacy midi devices.

This approach seems promising to anyone who has the time to tinker. Currently the only decent available USB-> MIDI device (by iConnectMIDI I think?) is approaching $200.

What I read in the comments section is that one problem you may encounter is the voltage levels of the shield may not be large enough for some bus powered usb devices. This coould be explored.[/url]
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MusicMan11712



Joined: Aug 08, 2009
Posts: 726
Location: Upstate New York USA
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PostPosted: Fri Jan 10, 2014 4:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

A bit basic, but good to know it can be done. Would be nice if you can use multiple port usb hubs as an "old school" midi merger/router (e.g., 4 usb devices -> single 5-pin din (or to more on a mega). Thanks for calling this to our attention.
Steve
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adnauseam



Joined: Mar 27, 2013
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Location: Manitoba, Canada

PostPosted: Fri Jan 10, 2014 4:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

I got a little bit excited and ordered an Arduino with some USB and midi din jacks. well see how it goes in a few weeks Laughing
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MusicMan11712



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PostPosted: Sat Jan 11, 2014 9:57 am    Post subject: Reply with quote  Mark this post and the followings unread

Site for version 2 of the shield:
http://www.circuitsathome.com/products-page/arduino-shields

Site for the original version:
http://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-for-arduino/
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adnauseam



Joined: Mar 27, 2013
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PostPosted: Sat Jan 11, 2014 10:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Quite pricey! I purchased some USB to serial adapters for about 2 bucks each. they convert USB date into serial data with no setup our drivers for the arduino
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cappy2112



Joined: Dec 24, 2004
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PostPosted: Fri Feb 21, 2014 12:52 am    Post subject: Reply with quote  Mark this post and the followings unread

adnauseam wrote:
Quite pricey! I purchased some USB to serial adapters for about 2 bucks each. they convert USB date into serial data with no setup our drivers for the arduino


Would you post the link for those adapters?

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adnauseam



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PostPosted: Fri Feb 21, 2014 1:20 am    Post subject: Arduino USB Reply with quote  Mark this post and the followings unread

So I got mine in the mail a few days ago..

They're Mini A usb connectors. Bummer

Most devices will have Standard USB B (or sometimes USB A)at the instrument end (that's the more square, robust connector) and Standard USB A at the other end (the more rectangular, annoying connector)

So It was my fault for buying an item with a poor description and a bad photo (and also not enquiring).

They're still available on ebay for cheap, though.


*** Disclaimer: I haven't tried either of these as the ones I ordered weren't what I wanted. ***

USB A
USB B (the larger one)

I have ordered a few of the first ones. I have the most of these cables available. I plan to first try it out with my Korg NanoKontrol and later my Behringer BCR2000
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gdavis



Joined: Feb 27, 2013
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PostPosted: Fri Feb 21, 2014 11:51 am    Post subject: Reply with quote  Mark this post and the followings unread

The difference between the "expensive" shield and the "cheap" usb to serial converter is that the shield acts as a host which can enumerate connected devices while the converter can only act as a device which must be connected to a host.

Most midi controllers are usb devices, not hosts, and will need to be connected to a host to operate.

I don't mean to be a downer, but I don't think the simple usb to serial converter is going to allow you to connect to midi controllers, you need the host shield.

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adnauseam



Joined: Mar 27, 2013
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PostPosted: Fri Feb 21, 2014 12:06 pm    Post subject: USB Host Reply with quote  Mark this post and the followings unread

I was thinking this...

That was always the downside of USB, iirc.

I guess we'll find out soon enough Smile
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cappy2112



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PostPosted: Fri Feb 21, 2014 12:10 pm    Post subject: Re: Arduino USB Reply with quote  Mark this post and the followings unread

adnauseam wrote:
So I got mine in the mail a few days ago..

They're Mini A usb connectors. Bummer

Most devices will have Standard USB B (or sometimes USB A)at the instrument end (that's the more square, robust connector) and Standard USB A at the other end (the more rectangular, annoying connector)

So It was my fault for buying an item with a poor description and a bad photo (and also not enquiring).

They're still available on ebay for cheap, though.


*** Disclaimer: I haven't tried either of these as the ones I ordered weren't what I wanted. ***

USB A
USB B (the larger one)

I have ordered a few of the first ones. I have the most of these cables available. I plan to first try it out with my Korg NanoKontrol and later my Behringer BCR2000


BTW- the Arduino 2560 ADK has both host & target USB implemented.
It costs more, but you get a lot more program & data memory, IO pins, serial ports, HW interrupt pins.

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