Add, substract, multiply, divide, logic operations ...

[brad sanders]

>> This is really what a mixer does. An addition can easilly be created with an...

>a mixer would 'mix' them together, so that you hear both signals ...
>what I want, is that you ADD each 'value' or step of for example two
>different sino=EFds and that the result is again *one* completely different waveform

That's what a mixer does. A+B=c. Put 1VDC into each input, if the sum
wieghting is identical you'll get 2VDC out. If you sum + and - 1V, you
get nothing.

Think of it in terms of *function* and it's clear.

By the way: per the logic functions:

An OR gate is "sort" of an adder. Since binary has only two states, it
"adds" as well as it can in only one bit

1 + 1 = 1
1 + 0 = 1
0 + 0 = 1

It's not a great adder - but it does work in the case of a single bit.
An XOR gate works better because two used together can net one a "sum"
value and a "carry" value.

1 + 1 = 11
1 + 0 = 01
0 + 0 = 00

Here's the cool part that was something of a revelation for me when I
was in school learning "everything I already knew:"

1 && 1 = 1
1 && 0 = 0
0 && 0 = 0

A logical AND function is a MULTIPLIER. Since anything x zero = zero,
and since both inputs to an AND gate must be "1" to get an output, an
AND gate is perhaps the world's simplest multiplier.

Well, except for a switch. That would have to be the world's simplest
multiplier. 



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