Audio quality and WME9 series

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Hi all,
So sorry if you find message is a bit long :) .
I am using a dell dimension 4550, Windows XP home sp2, P4 1.8 Ghz, 640 MB
Ram. The following is what I have in my device manger:

Sound, video and game controllers:

ATI WDM Rage Theater Audio
ATI WDM Rage Theater Video NSP
ATI WDM Specialized MVD Codec
ATI WDM Specialized PCD Codec
ATI WDM TV Audio Crossbar
ATI WDM TV Tuner
Audio Codecs
Legacy Audio Drivers
Legacy Video Capture Devices
Media Control Devices
SoundMAX Integrated Digital Audio
Video Codecs


I captured a video of the desktop with the Audio (I captured the audio
through the basic microphone that i have) using WME9. My first question is:

when selecting the "screen capture" on the WME9 series main window, Why
there is only one option for capturing Audio (default Audio device)?

second is that I played the captured video using both WMP10 and WMM
2.1.4026. The quality of the audio was very low when playing the video using
WMP10 but it was good when playing the same video using WMM 2.1. I changed
the settings for the audio enhancement in WMP10 but no luck. Since the video
is suppose to be played by WMP not WMM, is there anything that I can do to
improve quality of the audio?

What if I want to burn the video to a dvd? what else I can use to have a
high quality professional sound?

thanks for your input.
davoud

.

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