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Hello, I would like to connect one of my PCs (OS linux) on a Marshall CODE 50 and take control via usb midi.

When I open /etc/dmmidi2 in read acces. Reading file char by char, I see information when I touch the buttons of the amp (PREFX, AMP, MOD, ...). I can find the information in CODE-Midi-Implementation-Chart-V2.1.pdf.

I usually get two or three bytes and cross it with the document.
But this frame is not in the form Start of Transmission> Header> Command> End of Transmission.

By against when I open /etc/dmmmidi2 in write access, I can not send any command.
After having turned on the amp, I sent the following sequence for RECALL PRESETS 05:
0xF0 0x00 0x21 0x15 0x7F 0x7F 0x7F 0x73 0x01 0x05 0xF7
0xF0 0x00 0x21 0x15 0x7F 0x7F 0x7F 0x72 0x01 0x00 0xF7
Start of Transmission> Header> Command> End of Transmission
This command does not seem to work. Is there an intermediary step?

Would it be possible to give me a typical sequence to the CODE or a document that will explain the procedure to operate (ON / OFF) one of the button (PREFX, AMP, MOD, ...) of the amp.
Thank you in advance.



asked 11 May 2018 at 07:24 AM

Yoann Thomas






Hey all - new to the forums, new to Marshall amps and had a few questions about the Code 50 I just ordered that will be here in a day or so.  I have played my guitars through my buddy's Code 50 and am familiar with editing the patches, tweaking the tones and getting the sounds that I want from the amp to fit my playing style.  What I am not familiar with is the use of footswitch and any Midi capabilities it may have.

1) Can one use just a regular on/off type of old school footswitch to turn an effect or amp on/off or initiate a patch change?  I have several old school footswitches I have successfully used on many different amps, albeit older amps, and it has always worked.  Curious since the Marshall footswitch actually holds presets if anything like that would work.

2) As far as Midi goes, I come from a Line6 multi-effects world and know that many of their multi-effect units have the capability to control effects on/off/parameters and patch/bank switching via Midi commands.  Does the Code software have anything like that if hooked up to a PC/Mac running a DAW that has the capability to send midi control commands to change patches/effects realtime during recording/playback.

Thanks for any input and excited to get this amp.  I am a player of over 30 years and have only ever played through Crate amps for the past 20+ years that have finally given up and the cost to repair is more than new.  Bash Crate all you want but they were loud and proud and with the right EQ/effects loops made some damn good musical sounds.

CODE Presets USB Footswitch MIDI

asked 20 Mar 2018 at 03:04 AM

Billy Nab






I just want to check with fellow CODE users if they are facing the same issues that I am dealing with.

Biggest (and most annoying) issue is, it's a matter of luck connecting the CODE through USB. 2 times out of 10 my pc recognizes the amp the first time I plug it in. Mostly it gives an error that device is not connected properly or not recognized by windows. So I end up unplugging and plugging again until (if ever) it's been recognized. (Using windows 8.1 btw) Then suddenly in the middle of a recording session my DAW starts to drag like if I am running on a PC Pentium 600.  (It's running on a 3000$ alienware) This is a sign that somehow CODE get disconnected itself.  Now you have only option left: Restart the PC and start all over again.

 So far I have checked with different USB cables, and I am using the shortest ones as possible as I can. (less than 80 cm.) I can't check with another pc since I don't have another one, but I am running Yamaha THR-10 smoothly, without any problems at all!

So I don't believe that there's an issue with my pc. And speaking of THR, why the hell CODE doesn't have it's dedicated USB drivers. I am kind of sure that the issue I am facing is all about the ASIO drivers that we are left with as an only option.

 Second issue is, maybe only 1 out of 20 times I am able to get any presets from web site. Even if it looks like CODE is connected in the Device Manager, and the Chrome (or Opera) says MIDI is connected, I can't send any presets to the amp. After a few tries, this ends up with web browsers got frozen and only option is again: restart your pc!

I really would like to hear from people who are facing similar issues and how they could get over with it. (if they ever could)

And hopefully the only answer I receive from Marshall team is not going to be: "Thanks for your feedback, we will pass this to our technical team"


CODE Presets Windows USB MIDI recording PC Driver

edited 07 Jun 2017 at 07:36 PM

Gurhan Ozkaya (1)

asked 06 Jun 2017 at 07:57 PM

Gurhan Ozkaya (1)
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