For the embedded electronics class I am currently taking at Pasadena City College PCC, I am working on building a arduino controlled 1176 compressor. Well mostly an 1176. The gain reductions section is a duplicate of the 1176. The output section is going to be a 2520 DOA. In order to get a very fast attack time instead of sampling the audio and looking for it to go over a threshold, I am doing it by using an interrupt that is triggered by a comparator.
Here is the case design as of last weekend, I still need to add a few controls.
Here is the gain reduction section PCB that I ordered from OSHPark.