Even though the pa50 etc have been overtaken by pa600 I think the converted styles sound really good. It is fidly tweaking them but hopefully those of us who still use the pa50 etc will find them a useful resource.
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Gem Wk4, Solton Ms60, Technics Kn5000, Korg Pa50sd, Yamaha Psr k1, Tyros 4, Korg Pa700