What is it called?

I'll email some instructions.

You shouldn't post your email as there are programs that can search for them inside forums like this and start spamming you. One way to get around that is to change a portion and then describe the changes in the text.

So instead of your real email, post xxxxxx@kc.rr.com with instructions to change the xxxxxx to aburger.

Here is an excellent way to improve on the basic volume pot attenuator, use the best resistor (Caddock etc.) that you can afford... http://www.lara.on.ca/~gandalf/

I agree with Gordus. I don't know why I didn't suggest the same. That is the scheme I am using with good results.