I was very excited when it arrived after two days. I have a Toslink cable plugged into the Apple TV and the converter supplies the RCA cable from the system into the converter and the converter with power. That's no problem at all thanks to the very understandable name of the inputs / outputs. Set the plant and connected to the AUX input. There was fortunately no noise in this state detected.
Then I selected the Remote app from Apple on the iPhone for a song on the Apple TV. Immediately came the music through the system and it sounded wonderful and completely free from noise.
Super, so I wanted to have.