![]() ![]() ![]() ![]() I already had some 25V 4700uF 85C caps and used one of those. Take very much care when desoldering the original capacitor as it is a thick board and if you do not keep it adequately heated it would be easy to break a pad off. I was expecting to see the original 3300uF had degraded significantly, but it still showed the proper capacitance and an acceptable ESR value when tested.Īfter replacing this capacitor, the MIDI Express XT immediately is recognized over USB on any of my computers, Mac or Windows, and it does not matter which kind of USB port I plug it into. Solution: Replace the 3300uF capacitor which supplies the input of the LM2940 regulator with a 4700uF. My own tests have confirmed I could sometimes, but not always, have success with a powered USB hub. The issue is a lack of sufficient 5V supply to power the unit. Presumably computers from the USB 1.0 / 1.1 era were a bit better about supplying this bus power when it is not specifically requested. I am bumping this thread as I have resolved the issue.Ĭredits to those who discovered the Apple keyboard trick - but it's not because of the USB protocol version - it's because some hubs and the Apple Keyboard are good about supplying extra 5v bus power. The MIDI Express XT is still a current product, and it is a good one for the most part (discounting my problems with USB3, which might have been the USB3 drivers fault, not MOTU's). ![]() I did that with my 828 mk3 hybrid when it stopped powering up three years after buying it. You should call MOTU Tech Support about their replacement program - $99 flat (if it is still the same as it used to be) and they send you a refurbished like-new unit. This is very odd and may be time to upgrade my interface. Once I do a Scan, the MIDI shows up at Port 8 (as it should) and the Sync Port no longer detects any data (even if I choose it as a source from the MIDI Monitor app). I even reset the XT to factory default again, but the data only registers as "From Sync Port" as the source when the keyboard controller is connected to port #8. Unfortunately, I still got the same results. Just curious if what I'm seeing is normal.ĭavenpom wrote:After I got home, I connected the XT to a USB2 hub and then connected the hub to the iMac. Tap some keys on your MIDI controller and see what Port is detected in the readout. Launch some sort of MIDI monitoring app that can see all your devices and display MIDI messages.ģ. Start up your computer and MIDI interface (be sure both are starting up fresh).Ģ. Would any of you MIDI Express XT USB users out there help me out by performing a test to see if you get the same thing? Try the following: So I'm wondering why this is displaying this way in MIDI Monitor or if it's supposed to behave this way. I was under the impression that the "Sync Port" is for realtime messages and MIDI Time Code. I noticed that upon startup of my computer, if I launched MIDI Monitor, I would only see data come across at the "Sync Port" even though my keyboard controller was physically connected to port # 8. I posted a topic here a few years ago after noticing that in order for me to get any of my music apps to receive data from my keyboard controller, I had to perform a Rescan through Audio MIDI Setup or MIDI Monitor. I've had a MIDI Express XT for many, many years now and have yet to figure something out. ![]()
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