Aluminum wiring

There is a benefit that your house will not burn down! You should get rid of that wiring ASAP. I remember being warned about such houses in the 70s, I didn't know there were any still around.

I had aluminum wire in my first house in the 60's. It is brittle and tends to crack and break where it is connected to the outlets due to plugging and unplugging movement of the receptical. When it cracks, it starts to arc over and can cause fires. Stanwal is right... get rid of it asap.

The most common fix for aluminum wiring is to have it "Pig Tailed" the electrician refits the terminating ends with copper. This leaves the aluminum in the walls in place. The concern ,as mentioned, is the brittle wire. But since the wires in the wall are stapled and not prone to movement it can usually remain undisturbed. At the ends where it most likely to me moved it can break or crack the replacing of the ends with the copper which is much more plyable reduces this considerably. As far as the sonic differences between copper and alum I doubt that there is much. If possible run a dedicated 20 amp circuit(copper of course)to the outlet for your system.

Remove it! Do Not mix copper and aluminum. Even pigtailing is dangerous. The two different metals will corrode one another, arc then burn your house down. If you can afford to do so, remove it! Copper would certainly sound better with the peace of mind it would give you. Cheers