This evening I had a nice pass of SO-50, maximum elevation 83 degrees, southwest to northeast so I decided to give it a try. I heard two callsigns distinctly and tried replying to them but they didn't hear me or didn't reply. I recorded the pass again with the line-in on my mp3 player. Using the simple earphones from my mp3 player gave me reasonable audio. The cable between the radio and the splitter was giving some issues again: I still had intermittent audio levels when the cable moved. Update: And I edited the audio file I recorded: took of the first noise until the first voices showed up in the audio. I may have cut off too much as I can't find the German callsign anymore that I was quite sure I heard.
Listen to audio attachment: