Equalizer APO is an open-source parametric equalizer for Windows. Compared to similar audio equalizers, APO is lightweight and easy to use. It can enhance your overall audio with a few clicks. Equalizer APO is compatible with almost any audio device. Equalizer APO supports multi-channels and it has very low latency. As a result of being an open-source program, Equalizer APO is continuously being updated and it\'s source code is freely available to the public. If interested, anyone can participate in improving Equalizer APO.