For the VST Emulation simply load the bank with the .PG8Xbank extention For the real hardware synths either use the two 32 preset banks with the .syx extention or the 64 preset bank (I believe the JX-8P can only load 32 sounds where the JX-10 can load 64)
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The free PG-8X synth is one of the best free synthesizers for vintage sounds that emulates the Roland JX-8P and Roland JX-10.
Unfortunately, the plugin doesn't come with a soundbank included so I thought it would be great to design a soundbank for it and bring more attention to this great synth.
As a bonus you can also use these sounds in your Roland JX-8P and JX-10 synths (.syx banks are included)