Has anyone heard of this headphone correction program? Here's a link but as usual the site collects cookies. https://www.sonarworks.com/truefi The claim is we're not getting the sound intended from studio producers and technicians with our headphones. You just start the program and type in your HP make and model and voila!.. they've been corrected This leaves me with so many questions like how would they know what was intended by so many producers with so many mixing techniques and equipment. And if they DID by some sort of miracle...why not make their own headphone instead of "correcting" everyone else's? I tried the free audition for my HD600 and not surprisingly the bass and treble needed boosting. I'm pretty sure any HP enthusiast knows both the bass and treble are not heaviest or brightest with the HD600's so sure the app sounded better on some recordings. Let me guess...with Grados the high end (sizzle) is reduced while the bass is boosted. Unless otherwise explained here I see this essentially as a scam when it comes to the claims. This programs isn't cheap especially when you can download free vst's and use a little knowledge of the HP you own. However, what does peak my interest are the HP's that are custom made to each and everyone's hearing. I think they're from Australia. This would be similar to getting prescription eye-wear...no? I recently had a hearing test which showed I struggle with hearing around the 6-8khz range typical for someone my age. But still, this would only rule out one factor...our ability to receive. There's still the question of how well the actual studio technicians/producers could hear. There was a famous monitor many producers used for mixing at one point in time. It was a Yamaha Y (something) The consensus was that if they could make the music sound good on those monitors the music should be fine or better elsewhere Since some old vinyl is so flat sounding (to my ears) I'm convinced with these recordings they factored in many use their stereos EQ settings or at least the Bass Boost. Just a theory.