Equalizer APO is an open-source, lightweight, and free audio equalizer software for Windows. It offers a variety of features to help you fine-tune your sound. It allows you to apply equalization to your output audio devices and to individual applications. You can also apply different effects to different frequencies and configure the output levels of each frequency band to create a customized sound profile. It also includes a graphic equalizer, which allows you to adjust the sound of the output audio device in real-time. Furthermore, it allows you to save and load different sound profiles, so that you can switch between them quickly and easily. Finally, it also includes a noise reduction feature that can help improve the sound quality of your audio.
It is easy to use and provides some decent 3D effects, headphone virtualization and configurable reverb with optional presets.