Korg Forums

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Until the introduction of 64 bit, MIDI was easily sharable between Windows applications. Several apps could open the same MIDI input, and get the same data.

Today, (for example) I cannot share "KRONOS 1 KEYBOARD" to Cakewalk Sonar (64b) and MIDI-OX (32b). If MIDI-OX is running with "KRONOS 1 KEYBOARD" open, Cakewalk can't access "KRONOS 1 KEYBOARD", reporting "The driver was not enabled". If I start Cakewalk first, then MIDI-OX fails at startup with "The driver was not enabled".

I looked into the "Configure KORG USB-MIDI Driver" app. At the bottom, it has a drop down menu for "Both", "32 bit only" and "64 bit only". It is set for "Both".

What other settings are needed to enable 32 bit and 64 bit concurrent operation?
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Kronos2 73, Presonus StudioLive, Cakewalk / Sonar Platinum, Windows 10

[KK]

Same behaviour on my computer as well, running W10 v1909. Looking at the Korg compatibility chart, about the MIDI-USB driver it is specified that A 64-bit application and a 32-bit application cannot use the same MIDI IN port simultaneously.

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As a test, I used loopMIDI to create a virtual MIDI device.
I used MIDI-OX to route the KRONOS 1 KEYBOARD MIDI input to the loopMIDI driver.

I was then able to open loopMIDI as an input device in 64 bit Cakewalk and 32-bit MIDI programs (such as my SysexFiler) at the same time. I confirmed that note and sysex data were received in both applications.

This is a "Rube Goldberg" approach and not really practical for day to day use, but it does demonstrate that Windows MIDI drivers support concurrent use by 32 bit and 64 bit applications. It also demonstrates that Tobias Erichsen knows how to write such a driver.

There are other drivers out there also, such as LoopBe that I have not tested

Since the Korg USB driver is used by many Korg products, hopefully they will be willing to invest the effort in properly implementing their driver.
I don't see a forum here for drivers, so I guess this forum is a good as any.
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Kronos2 73, Presonus StudioLive, Cakewalk / Sonar Platinum, Windows 10