Weird glitch...between iMac and kronos (F above middle C)

[BobTheDog]

The next step maybe:

Delete the User Preferences
You can resolve many issues by restoring Logic Pro back to its original settings. This will not impact your song files. To reset your Logic Pro user preference settings to their original state, do the following:
In the Finder, choose Go > Go to Folder from the menu.
Type ~/Library/Preferences in the "Go to the folder" field.
Press the Go button.
Remove the com.apple.logic.pro.plist file from the Preferences folder. Note that if you have programmed any custom key commands, this will reset them to the defaults. You may wish to export your custom key command as a preset before performing this step. See the Logic Pro User Manual for details on how to do this. If you are having trouble with a control surface in Logic Pro, then you may also wish to delete the com.apple.logic.pro.cs file from the preferences folder.
If you have upgraded from Logic Pro 7, you may also need to remove ~/Library/Preferences/Logic/com.apple.logic.pro.

[ed_f]

Agree with Bob on this delete prefs and then walk through your setup again.