[sdiy] analogue equations

[Ian Smith]

hello all,

Time for another weird Ian question/idea... I've been playing around with Analog Box (software modular synth thing, quite brilliantly done) and something you can do with it is have various mathematical equations that you can send waves through, e.g. x*(y+sinx) where x and y are the inputs to the block. I was wondering if it's possible to do this sort of thing in the analog patch cord world... do things like Sin and Cos and square roots. I know you can add two inputs because that's what a mixer does.

And now for the odd idea... I'm envisioning a module with two inputs (say x and y) and four 12 position rotary switches that would send the inputs through various math functions and between each rotary have a DPDT switch that would switch between adding or multiplying the output of the previous rotary to the next one. I was thinking for the math functions: x+y, x-y, x*y, x/y, Sin x, Sin y, Cos x, Cos y, x*x, y*y, square root of x, square root of y. again, if all of these are possible.

If people want, or if my description isn't clear, I can draw up a flow chart type schematic of this.

-Ian Smith
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