Please help me understand.
I always saw audio splitting to be a very simple system. If you split an audio signal into 2, each of the recipients will get 50% of the volume. Also, a device either sends a signal or receives a signal (adds to or subtracts from the system).
In the hopes that I would never have to change my AV receiver input, I tried to join all the signals via a Belkin Rockstar. I've attached an image illustrating what I did. The results were disastrous.
Here are some of my findings. Whenever i say "additive" or "subtractive", i mean with respect to the output volume of my receiver.
1. The Wii input was always great. No matter what combination of things I had running, the Wii input was always purely additive.
2. The xbox360 input was always additive when the console was turned on. When it wasn't, it was highly subtractive.
3. The PC input was both additive and moderately subractive at the same time. Its signal comes through fine, but everything's volume is cut in half.
4. Any mp3 player (tested a sansa clip and an iphone) made EVERY other source decrease by 90%, but itself played loudly.
At this point I'm just really curious. Is anyone able to go through point by point and explain to me why these things happen?

I always saw audio splitting to be a very simple system. If you split an audio signal into 2, each of the recipients will get 50% of the volume. Also, a device either sends a signal or receives a signal (adds to or subtracts from the system).
In the hopes that I would never have to change my AV receiver input, I tried to join all the signals via a Belkin Rockstar. I've attached an image illustrating what I did. The results were disastrous.
Here are some of my findings. Whenever i say "additive" or "subtractive", i mean with respect to the output volume of my receiver.
1. The Wii input was always great. No matter what combination of things I had running, the Wii input was always purely additive.
2. The xbox360 input was always additive when the console was turned on. When it wasn't, it was highly subtractive.
3. The PC input was both additive and moderately subractive at the same time. Its signal comes through fine, but everything's volume is cut in half.
4. Any mp3 player (tested a sansa clip and an iphone) made EVERY other source decrease by 90%, but itself played loudly.
At this point I'm just really curious. Is anyone able to go through point by point and explain to me why these things happen?
