i have a tsstcorp cd/dvdw tsh552l burner. it burns cd's and dvd's fine and they playback ok on other players. but the burner plays all discs at about three-quarters speed and the audio is also as slow with a little reverb to it. i've checked the device manager and all the settings seem to be ok. i've cleaned the lens. i've uninstalled the driver and reinstalled after reboot. any ideas???