The connections are simple now.
It got a little wiry but it plays alright.. The following sample is a single note (until the end where I start to improvise 
The loop is made by the envelope only (decay time)
The original site of JAREK ZIEMBICKI is here
There is this other guy named krüe who modified a little the hardware (used an atmega 32 instead of atmega16 and a 16MHz osc instead of 8MHz) and added a lots of features. Source code included! here
A note. I found that the code on Jarek’s site didn’t work with my atmega16 so I got the hex file off here where they also sell ready made boards.
My sample is here
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