Thanks for the heads up. I’ve only been using my no-name interface to transfer patches, so far without problems. But I’ll keep your info in mind.
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On Dec 20, 2019, at 8:51 AM, gregdunn@... wrote:
A couple of things to be aware of: The DX7 and other synths from that era predate the current MIDI spec and really want to have a 5V signal on the line. The MOTU Fastlane (which I have) does this and has always been reliable in my setup, even in the days before OS X. However, I recently bought one of those 4x4 no-name interfaces, and it only delivers 3.3V on the data lines. The result is that it does not reliably send data to my DX7; note triggers work but SYSEX data usually fails. The MOTU works without a hitch.
The other thing is that many librarian apps (like Sysex Librarian) while able to work with class compliant devices, do not work with Core MIDI. They have their own interface code and if you are using Audio MIDI Setup to configure your system, these apps will ignore those settings and possibly cause a conflict with other MIDI apps. You will also not be able to route their data using AM Setup.
I just went through all of this within the last week, and it was a lot of effort to troubleshoot because the symptoms were hard to observe repeatably.
