Yamaha DX7 / TX7

Just tested that to make sure it works. It does with my TX7.

Do the MIDI IN/OUT indicators on the screen flicker when you press the [PATCH REQUEST]? The best way to find out what is happening is to open the ElectraOneConsole application and observe the log messages in there. It usually gives a good indication. If the messages were too cryptic for you, just export the log file and share it with us or PM me.