Well, looking about I'm more and more convinced that it's an old wives tale, I did get the 'further' mode to work on my SRV-330, it's a little different to how it's described here:
Knowledge Base | Roland U.S.
Quote:
1) Power on while holding down PROGRAM and SYSTEM.
2) Hold SYSTEM and press the FUNCTION 1,2,and PROGRAM. "LOAD: ALL" will be
displayed.
3) Press SYSTEM.
For me it was:
1) Power on while holding down PROGRAM and SYSTEM.
2) Hold SYSTEM and press the FUNCTION 1,2,and PROGRAM, something like "Preset: ALL" will be displayed.
3) Press MEMORY (it's lit up).
It loads up and then you get about double the parameters, not sure how useful they are though as they seem to things like additional EQ.
Sort of thinking about getting an SDE-330 now, I am loving the thickness of the verb on the SRV