I have an old Kawai K1 (the original) with DIN MIDI In/Out/Thru that I would like to connect to my Win7x64 system to use as an input device for Sibelius.

I purchased an inexpensive MIDI-to-USB adapter cable from LiDiVi but it didn't work at all. Monitoring with MIDI-OX I would see a few Active Sensing messages from the keyboard and then Windows would sound the "USB Device Disconnected" beep.

So I bought another adapter (Sanoxy). This one stays connected, and I can see a steady stream of Active Sensing coming from the keyboard. When I play notes on the keyboard I see Note-On, Note-Off and All-Notes-Off in the MIDI-OX monitor window.

In Sibelius, it "sort of" works for input but is quite unreliable. Sometimes key presses are ignored. If I hit the same key again sometimes the note is entered, and sometimes I get two noteheads, as if the Note-Off for the first note was not received. Occasionally the note entered is an octave or two high or low. All this means that I have to visually check each note before moving to the next, so it's not usable.

Watching the input stream with MIDI-OX I see the keyboard sending occasional System Reset messages, which are only one bit different from Active Sensing (FF vs FE).

My questions are:

1. How reliable are the inexpensive USB-MIDI adapters one can purchase on Amazon?
2. Do the random System Reset messages indicate a problem with they keyboard or the USB-MIDI adapter?
3. MIDI-OX only shows what is being received, how do I determine if the issues is at the keyboard of the adapter?
4. If I buy, say, a Roland UM-ONE-MK2 adapter am I likely to have better results?