Windows Control Panel 2011-04-11 16:17:33 Hello everyone.I have a theory that I was wondering if anyone had any experience in, but first some technical details of what I am running because this may or may not be Hardware and Driver dependent.Sony Vaio VGN-NS135E (Built for Vista)Running Windows XP Pro BEUsing the XP-specific drivers from SonyIntel Realtek HD 192Khz/32-bit AudioAnyway. I used to have good luck messing with the "Speaker setup" in the audio devices back in the SB 128PCI, then SB 24-Bit era and felt like messing around with it some more and seeing what works because of the wimpy Bass output. After confirming a 50Hz notch filter was going through the sound card with the http://HigherFi.org software I tested out some of the speaker options.There are only three that will work with headphones and speakers in my mind. Stereo Speakers, Stereo Headphones and No Speakers.I don't want to write like i'm writing an article that would appear in the mailbag of stereophile, but the "No Speakers" option yielded very "revealing" results when I compared the way it sounded with my Sony MDR-7506's. The notch filter was also gone. Basically the good mixes sounded far better and the bad mixes sounded a little worse.Would it be safe to assume that selecting "no speakers" turns off DirectSound filtering? The tone of every recording had this "rounded-off" quality to it before and I was honestly getting better results from an old Toshiba laptop with a 16-bit 48Khz card before this fix. So what is going on here?The quality is far superior now. The only bug I have found is that MS wants to label the channels as "Channel 1" and "Center" now, which obviously has no audible effect. I am convinced that anyone running XP with a Realtek HD chip should at least check to see if it improves things on their end. This may be one of those things that people simply don't do because they didn't consider it and it may be harming the quality if not implemented. I use the only output it has, which is analogue, so ASIO or bypassing the K-Mixer in favor of digital is not happening without a new Sound Card.Any help understanding what is going on in more detail would be appreciated.