Ratio control for the classic compressors

[deblacksin]

Hi there!
I've been reading on this forum for many years (over 10?) Since I was a kid and getting excited off the melting solder, and through all those years studying so much from the members here, the schemes, the mods, and the huge amount of information. Truly, this is my hobby for so many years thanks to you.

To our business.

My metalist-producer-cubase user friend got himself a dist pedal and asked me to build him a simple compressor. I already had the parts and a tonepad PCB of the Dyna comp and built it to him with success. I than asked what other controls he wants me to try to add, and he asked for ratio.

I understand it's more of a limiter than a compressor, but is there any chance to effectively control how much signal is being compressed when the signal exceeds the threshold?

I understand the compression is occurring due to the change of voltage applied to leg 5 by the envelope section output, and the envelope changes according to how much current goes inside it.

Than maybe a limiting resistor, between IC output and the envelope input? Or maybe a resistor between the phase inverter to Q3 and Q4, so the output volume won't drop (cause the output is taken of Q2 emmiter).

Or maybe some kind of a mix pot (or switch with fixed settings) between the uncompressed signal and the compressed signal? So a 1xcompressed and 4xpre-compressed  mix will yield a 1:4 ratio.

Any thoughts?

[xorophone]

Hello! I started a very similar thread earlier today that might help you in some way (when I get a reply). Here's the link: http://www.diystompboxes.com/smfforum/index.php?topic=116679.0

Not really the same question, but it might give you some more insight in how it works. I bet you'll get some better explanations here though, but this is the best I can do.