I recently started using PC Equalizer for my 2.0 system that uses a Windows PC as the main component for sending sound to a DAC via a USB connection. I also have a Denon DVD 2910 connected via coax and a 4k TV's optical output connected to the DAC. The PC is what I use the most for watching everything from video to music files via a shared library of content and general web surfing. I came across this program a few weeks ago and installed it. So far I am very impressed with it. I have made custom EQ files for all four sets of speakers connected to this system and the improvement in sound output has been substantial. I have also done customized EQ files for playing movies and different genres of music. It has a choice of 10 or 20 band equalizer settings and many other ways to manipulate sound that I don't fully understand yet. I am kind of blown away with this program and how it can manipulate sound output in a very detailed way. Has anyone else used, or currently use, this program? A search here had just one mention of it in one post of one thread.