I prepared scheme:
(Amplifier I use is Pioneer A-307R http://www.pioneer.eu/eur/products/archive/A-307R/page.html
TV Samsung UE40D6750 http://www.samsung.com/uk/consumer/tv-audio-video/television/led-tv/UE40D6750WKXXU)
I connected to Apple TV both HDMI and TOSLINK to be able stream only Music (without need to have TV turn on).
The key point here is the "2RCA to 1RCA" connector, which makes the volume up when one of the device (TV or AppleTV) is turn off. (Or makes the volume down when one of the device turn on alongside other).
While you watching TV on TV alone, when you turn on the Apple TV the volume goes down, when you turn off the Apple TV it again goes up to the original level.
Could you explain me why it happens ? And how can I make it work without the volume going up and down?
I thought of ARC system where I will get rid of the TOSLINK cable, and plug the the HDMI directly to the Amplifier, although my Amplifier doesn't support ARC , and I doubt that there are connectors that make it possible to be compatible with ARC and have RCA output.
Thank you very much for your time and help.