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Why Your Software Can't See MIDI Devices

June 30, 2014
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Device Manager is showing duplicate ports for the Korg NanoKontrol and Line 6 POD HD500. Uninstalling the duplicates frees up ports.
I’VE INSTALLED USB MIDI DRIVERS FOR KORG’S KONTROL SOFTWARE, AND WHILE THE DRIVERS SHOW UP AS EXISTING AND CONNECTED, THE KONTROL SOFTWARE DOESN’T SEE IT. WHAT CAN MAKE MIDI DEVICES JUST DISAPPEAR?

COLIN MCCLINTOCK
NEW PORT RICHEY, FL
VIA EMAIL


Windows has a limit on the total number of MIDI ports, and worsens the situation by creating duplicate ports if you plug a USB MIDI device into different physical USB ports. The usual solution is deleting duplicate ports.

You can create a batch process file to reveal hidden ports in Device Manager. Type the following in Notepad and save it as a .BAT file (e.g., ShowPorts.BAT): set devmgr_show_ nonpresent_devices=1 start Devmgmt.msc

Connect some USB devices you use often. (Note which ports you’re using so you can keep associating particular ports with particular devices in the future.) Double-click on the .BAT file to open Device Manager. Choose View > Show Hidden Devices, then open Sound, Video, and Game Controllers. A speaker icon to each item’s left will be solid if the device is connected, and grayed out if not. Rightclick on any grayed-out drivers for the connected devices, then choose Uninstall. (Don’t Delete the driver.) Once the number of ports goes under the Windows limit, your Kontrol software should recognize the drivers.
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