Keith McMillen Instruments K-Board User Manual - page 19
Connect to a different computer
If the K-Board is not making a connection to the computer at all (and all other troubleshooting issues
have been exhausted), it is recommended to try connecting it do a different computer. If it works
on the new computer, try the original one again. In some circumstances we have seen this solve
connection issues.
Mac CoreMIDI Bug
There is an interesting (potential) bug in CoreMIDI on
Mac OS that can lead to some connectivity issues — not
just with the K-Board, but with any class-compliant MIDI
device.
Upon connecting the K-Board (or any class-compliant
MIDI device) for the first time since powering up the
computer, the K-Board will make a proper connection to
the computer but will not refresh/update the MIDI device
list.
The effect of this is that any audio/MIDI applications that
are already open (like the K-Board Editor, Ableton Live,
Logic Pro, etc.) will not detect the K-Board, even though
it’s properly connected to the computer. The only way to get the MIDI device list to refresh is to unplug
then reconnect the controller, or to manually refresh the MIDI devices by rescanning MIDI in Apple’s
Audio MIDI Setup application (located in /Applications/Utilities).
What’s interesting is that this behavior does not occur if it is the first time the controller has ever been
connected to the computer. It seems that when the MIDI device is created in Audio MIDI Setup the
device list gets refreshed, but if the device already exists in Audio MIDI Setup the list does not refresh.
Whether or not this behavior is intentional and expected, it is something to be aware of. We have
noticed it on Mac OS 10.6 through 10.9. The one thing to do to minimize the chances of running into
this “bug” is...
After powering up the computer, always connect the K-Board to the computer before opening any
applications.
“Okay, so how do I fix it if this does happen?” Well, if you do run into this problem, there are a
number of ways to fix it:
• Unplug the K-Board and plug it back in.
• Open Audio MIDI Setup and click the “Rescan MIDI” button in the MIDI window.
• Open another audio/MIDI application.
All three of the above methods refresh the MIDI device list, which should lead to proper “in-app”
connections.
Troubleshooting |
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