Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

Now that the photocoupler is working, I've noticed some parameters not being stored for a few patches. The affected patches are A5,6,7 and C6,7. A5 just seems to lose the cutoff value. The others lose MG values and a couple seem to lose just about everything. I can't see anything that would cause this other than a bad memory chip. So, the question is, where is a good source for the TC5514 chip and are there other compatible replacements? It looks like Vintage Synth has them.