I wasn’t that successful.
On Sunday I played around, connected the Pisound to the Raspberry Pi via the Butterfly gpio two header and cable. And wondered why the Pisound was smoking. Somehow I forgot that the pins on the Butterfly header are crossed. So I put 5V into a pin where it shouldn’t be.
Fortunately, a new Pisound arrived on Friday (I also ordered a pimidi and the Pisound arrived, another mistake I have to deal with).