On 1/3/15 9:25 AM, Sean Caron wrote: > I have seen those parts kits you mention and I have wondered about them as > well... I assume they are targeted at guys like me, people trying to build > home brew 990 machines? The one I pointed to has a CPLD, so it seems like it is a parts kit for something.. There are other kits that have a Yamaha ASIC.