I have a media center PC with on-board Realtek AC97 Audio. I have been using Windows XP for a couple of years with great audio quality.
I just upgraded this PC with Windows 7 and installed the latest Realtek drivers from http://www.realtek.com.tw/downloads/
At the testing screen, all the speakers works correctly (including subwoofer). Despite that, while playing any movie or music, the subwoofer quality is terrible. From it it just comes noises, in the correct rhythm but quite low and quite out of tone.
I compensated the loudness by putting the other speakers lower but the sound of the subwoofer is really terrible.
Is there anyone facing the same problem? Does anyone have a workaround for that?
PS.: I had gone past the steps given in Terrible noises from subwoofer of ACER Aspire 6930 with Realtek sound chip but still I have a bad quality of sound. My problem is very similar to the one in http://www.mp3car.com/car-audio/143796-realtek-hd-audio-is-robbing-my-subwoofer.html