When a new OS is loaded into a Novation synthesizer, the first thing
the OS will do is rescale any sounds in the Novation memory to be as
similar as possible to the way they were with the old OS.
eg with OS4.1 for the Nova, the distortion algorithm has been greatly
enhanced. A distortion level setting of 127 in the old OS will
correspond to a setting of 020 or 030 in OS4.1 . Any program stored in
the Nova memory which had a distortion setting of 127 will be changed
to have a distortion setting of 020 when the new OS is loaded.
If any sounds are loaded in from sysex files after the new OS has been
installed which were made with the old OS, these will not be rescaled.
In the above example, the distortion setting of 127 will be left at 127
and the sound will have a different character to the way it was
If any sounds are stored externally and need to be rescaled, they will
have to be loaded into the synthesiser running the old operating system
and saved. Then the new operating system can be loaded, the sounds will
be rescaled and these can then be exported as a new midi file. If this
has to be done with several sysex data files you will need to restore
the original OS. This is done by holding down the part 6 button while
the synthesiser is turned on. The screen will show "restore O/S from
ROM to flash?". Push page up to accept this prompt. The reload should
take around 5 seconds.
The steps for this are:
Install original OS
Load in original sound sysex file.
Install new OS
Export rescaled sounds.
Repeat if necessary