Thanks for your interest/response to my call for help.
[/quote] It's been so long since I've relied on OMS hehehe.
The ease of using OS X audio/midi setup is not appreciated until you try to use OMS/FreeMIDI sequencrs in OS 9 and prior.
I have a huge collection of "Adobe Premiere" and VST plugs that can't be used in OS X. Also in my opinion some of those plugs are better then what exists under OS X. Now, occassionally I need to add some special fx to an audio file I created with an OS X sequencer. In those cases I bounce back to StudioVisionPro ( running in OS 8.6 ) and apply those special fx.
If so, which PSR model are you after?
I am looking for the PSR series such as the 9000.
The OMS device documents are documents created as I understand it by the Studio Patches editor. As I noted, I've found that programme very hard to use. I've opened those OMS device documents using BBEdit only to discover that they have very specific instructions for comunicating with the synth/sound modual. To alter the device documents with BBEdit would no doubt create havoc with the synth/modual unless one understands all the different lines of text.
To bad there isn't a way to compile a FreeMIDI device document to become a OMS device document. The FreeMIDI device documents are created using Apple's SimpleText and very easy to change without destroying a synth/modual.
Incidently, i'v reinstalled OMS and the Yamaha PSR device documents not there. This leaves me to conclude that some dedicated OMS/PSR user created the OMS device profile and gave it away on one of the opcode user forums.