The archives from June 2007 had a thread entitled "Device disconnected while playing". The original problem: "We are trying to get a notification when the current MIDI device gets disconnected." Roger said they look into it, and suggested where they should look, and what they might look for.
Notification on disconnect is of interest to me, so I took a quick look, and sure enough, code I insert into the MIM_CLOSE case in winmm_in_callback() from pmwinmm.c gets run shortly after I disconnect or power down a USB midi device. Before I decide how I'm going to make it so this notification is passed back to my client application, I want to make sure I can catch this same situation on OSX. I've found reference to a constant "kAudioDevicePropertyDeviceIsAlive" but being completely unfamiliar with CoreMIDI, I don't yet know how to make use of this tiny nugget of information. Any suggestions? Thanks
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