Korg Forums

Hi, I am having issues with midi on the tr.

First it seems my midi in port just doesn't work.
-To make sure the cord works i tested it on my microkorg and it worked both in and out.
-my tr can send midi out through the cord fine.
-it doesnt recieve anything on the in though
-i tried hooking up cords to in and through, and the data didnt even make it to the through.
-i can receive midi in through the usb cord on the same channel as i tried with the midi cord so its not a midi channel issue.


so now i have to use the usb connector.
when i use the TR with the usb connected i get horrible whizing whurring and crackling feedback probably from the computer cpu or something. I dont get the feedback on headphones right from the tr but when i output to the mixer and have headphone on there is when i get the feedback.

this is the setup

TR outputs go to mixer inputs-> mixer outputs go to usb soundcard inputs-> soundcard outputs go to mixer monitor inputs-> computer is hooked up to soundcard by usb, computer also hooked up to TR by usb for the midi.

some kind of nasty loop has formed between my equipment, how to alleviate it?

Any help or suggestions appreciated.
Thanks!

not sure about the MIDI problem - sounds like you might have an actual hardware issue there. but I'd suggest re-checking your channels, make sure that you've got the out from your control going into the in on the TR. by the way, what are you trying to use to control your TR?

with the 'feedback'. it is an issue with a large amount of audio hardware. not a problem with the hardware as such, it is more to do with the computer using poorly RF shielded cables, ports, etc. you get interferance from the data lines usually making its way through the power ports. I've had it coming down USB/MIDI devices through MIDI cables too.
First thing I'd recommend is making sure your USB or MIDI cables don't get too close to your audio cables. if you're using cheap cables, try some more heavy duty ones which will be better shielded. generally it is the plugs/sockets that are more vulnerable to interferance rather than the cable, for example I found just changing the angle of the cable solved issues in some cases.

you could also try getting a ferrite core (one of those magnet block thingies on cables) on your USB cable... but I haven't got any proof of that working.
also make sure that your USB is plugged into a socket on the motherboard at the back rather than any expansion ports, front ports, or USB hubs.

if you're using a laptop, there is a different kind of interference from the high-frequency switching power supply, which you can eliminate from running on batteries (other than that, there is no cure. most laptop manufacturers will deny that it is even a problem)

Unplugging my laptop and running on battery completely got rid of the interference.
Thanks X-Trade!