Hi, I'm an artist and a total electronics novice with VERY limited knowledge. I'm working on a project and was hoping to get some assistance. One of the parts in the project will be a simple (at least what I THINK should be simple) audio device that essentially self regulates its amplitude output based on its amplitude input. Very simply, it'll have a small speaker connected to an oscillator. There will also be a mic. The output of the mic (which can hear what's coming the speaker as well as the overall amplitude level in a space) will eventually be connected to the input of the oscillator so that the speaker is always at a certain output level. If it rises above it, the mic will lower the voltage input of the oscillator (i.e. lower its output), and if it dips below, the mic will increase the oscillators input (i.e. increase output at speaker). Seems easy enough in theory, but I know next to nothing and don't have a clear idea of how to proceed! I've done some research and know that I need to filter and rectify the mic's signal (though not entirely clear how to do that). I don't care about the frequency so much, though it would be good to be able to control it. I want to keep this fairly low-fi, so i'm not looking to use high end mics or anything of the sort. I appreciate any advice anyone has. Thanks.