> I can repdoduce the problem here, and it's not erratic at all, in fact > the behavior is 100% consistent. If gmidimon or another app already has > the MIDI port open, then aseqdump will get -EBUSY (aka "Resource > temporarily unavailable"). > > If you had tested these apps one at a time then this would be obvious. > I'm absolutely sure that I have succeeded, one time or more, in monitoring the same midi device with gmidimon and aseqdump simultaneously. Regards Philippe