keysvocalssax

If you take an SD1 and load OS4.0c (with the new sounds option which will require about 14 disks to complete), then you'll pretty much have the SD1Plus. Also, you'll have to download the new bonus styles associated with the [plus]. The older styles have also been revoiced to take advantage of the new sounds too.

I say pretty much because the Plus has extra memory dedicated to the new Stereo Grand Piano sound which can still be played in a regular SD1 but missing a little resonance detail - but that is it.

Thanks,

AJ