Article ID: 296615 - View products that this article applies to.
This article was previously published under Q296615
When you attempt to change the CD-ROM audio volume by using the multimedia mixer volume controls, it does not move the slider to adjust the volume. Also, if you click to select the Mute check box that is located under CD Audio, the sound is not muted.
This behavior can occur because Windows 2000 has the capability to perform Digital Audio Extraction from a CD-ROM drive, which may return higher audio quality and faster "ripping" of CD-ROM audio to the hard disk. This capability, however, is disabled by default on Windows 2000.
In Windows XP, this capability is enabled by default. The CD-ROM audio volume slider in the multimedia mixer volume controls does not control the volume for the CD-ROM audio. The volume is now controlled by means of the wave volume control. The audio data is transferred as digital data, goes through digital to analog conversion by means of the CPU, and then it is converted to wave data.
To work around this behavior, enable Windows Media Player to send analog audio calls to the kernel (which still performs digital reads). This method can keep digital playback at the kernel level (in Windows Media Player only), and respond to the volume slider in the multimedia mixer volume controls for CD-ROM audio.
To enable the control of CD-ROM audio volume:
NOTE: It is recommended that you do not disable the Digital Audio Extraction feature as you can also disable other features that enhance audio playback and recording in Windows Media Player.
For additional information about Digital Audio Extraction, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/271647/EN-US/ )A Description of the Digital Audio Extraction Feature
(http://support.microsoft.com/kb/264201/EN-US/ )Cannot Select Enable Digital CD Audio for This CD-ROM Option