This is the site to publish the original analog audio signal processor circuit designs from the scientific research. As this site entitled, the circuit designs published here are more related the analog audio processors such compressor, gate, expander, tone control, equalizer, and so forth.

There's a number of the basic circuit designs published here, those intentionally for the visitors who just want to learn about the analog audio signal processor circuit design basics. For those who want to try further, the implemental circuit design also available here, and of course it is seriously designed for professional audio recording and professional sound system.