Roland have just released firmware 1.2 for the System-8 - the flagship polysynth of the AIRA range - we reviewed it a while back and were impressed. Despite its digital engine, it really worked as and instrument, The plug-outs added a fair bit of variety, but the basic System-* engine had a lot to offer.
Instructions for downloading and installing can be found here.
With the Firmware v1.2 the System 8 gets 5 new filter types:
And two new Oscillator FM variants each with 6 subtypes.
See our full review: