I'm looking to find out if an equalizer would be a good buy. My plan is to first try a free equalizer like equalizerAPO. I have a laptop with a lot of music files, a usb dac, a umik-1 and a little bit of experience with REW. If it's good I'll check for an hardware integration since I prefer to use my cd player and turntable. Does anyone have used equalizerAPO or has an alternative??