When pressing a key on my midi device and monitoring it in Midi-OX, it takes a long time (about 5 seconds) before it registers another input. Note that I'm nót talking about the delay between pressing a key and midi-OX registering it, but the delay between it registers another key after pressing one. A "cool-down period" so to speak before it recognizes another input.
I have used both Cubase and Midi-OX as software to monitor, and both have the same problem and "cool-down" period of around 5 seconds. I have tried both a PSR550 keyboard and a Yamaha Clavinova piano - again same result on both.
I use a Logilink UA0037N Adapter USB to Midi (In-Out, 1,9 m) to connect the keyboard/elec piano to my Medion Erazer laptop.
What could be the problem?
EDIT: As suggested I bought another cable: M-Audio USB Uno MIDI Interface 1 in/out. About twice as expensive (€30) and the best I could get. There is still the same delay. This cable does seem to be more sensitive for touch-sensitivity and pedals etc., but as soon as I press a key it will not react to another press (or release) for ~4 seconds.
The plot thickens though - anything other than the black-white keys on the Clavinova/PSR work perfectly fine. The pedals, buttons and pith-bender all work real-time.
Even stranger still - after any input óther than a key, the "cooldown" will reset and it will react to another key-press or release, at which point it stops reacting to any more key presses again.
So I've used different devices (PSR/Clavinova) different cables, different software (Cubase and Midi-OX) and different computers (tested everything with an old laptop as well that had usb2 instead of usb3 ports). I also looked in the PSR manual to set it to "midi output mode", which is apparently a specific mode for the keyboard when using it as a midi device. All setups and combinations have the exact same problem.
EDIT2: Turns out it WAS the cable. I just took my entire setup to a place that had dozens of different cables lying around, and eventually one worked normally. It seemed to be completely random which ones worked and which didn't though; some really cheap cables worked and some high-end brand ones didn't (though cheaper cables had the problem way more often). I really hate midi now.