Cakewalk Sonar seems to be losing communication with my MIDI devices (either keyboards or control surfaces), what can I do?
Try first going to My Computer, C drive, Program Files, Cakewalk, Sonar, and delete a file named TTSSEQ or TTSSEQ.INI. You can immediately launch Sonar again and it will re-detect your MIDI interface.
If this does not solve the problem, go into the TTSSEQ file (double-clicking it should launch Windows Notepad) and add this line under [Options]:
IgnoreMIDItimestamps=1
Save the file and relaunch Sonar.
If this still does not help, in Sonar, try going to Options – Global – MIDI and raise the Prepare using 500 Millisecond Buffers to 1000.
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