Bill,

Yamaha S80 is not GM compatible. It will be a lot of work to try to map its panel sounds to GM - it is not quite possible because it does not have all the equivalent sounds to GM map. However, if you purchase the PLG100-XG tone generator plug-in board then your S80 becomes GM/XG compatible. When I bought my S80 last month, the XG expansion board was not available yet. Well, you may not like Yamaha's XG sounds though. The best GM sounds I have ever heard from a regular keyboard/module is the Solton X1 arranger keyboard - much better than Roland GS, Yamaha XG and others.

Paul Ip
from Texas