As with all Windows Media 9 Series codecs, it supports the Windows Media digital rights management platform, which is used to securely package and distribute copy-protected digital media. WMA 9 is backward-compatible with previous Windows Media Audio-compatible decoders, which means that WMA 9 content can be played with previous versions of Windows Media Player or older consumer electronic devices that support Windows Media. With VBR, the encoding bit rate increases to capture complex sections of data and then decreases to maximize the compression of the less complex sections, producing compact, high-quality compression. The Windows Media Audio 9 codec (WMA 9) supports variable bit rate encoding (VBR), which enables even higher quality audio at smaller file sizes by automatically varying the encoding bit rate according to the complexity of the audio data. The resulting sound quality is 20 percent better than audio sampled with Windows Media Audio 8 at equivalent data rates. This codec samples audio at 44.1 or 48 kilohertz (kHz) using 16 bits, similar to the current CD standard, offering CD quality at data rates from 64 to 192 kilobits per second (Kbps). A technical support person might be able to use this detailed information to help you troubleshoot problems on your computer.Windows Media Audio Codecs Windows Media Audio 9 Your web browser will open a page that includes information about the related binary files, codecs, filters, plug-ins, and services installed on your computer. On the About Windows Media Player dialog box, click Technical Support Information. If the Help menu is not visible, click Organize, point to Layout, and then select Show menu bar. On the Help menu, click About Windows Media Player. There's an alternative page for versions 6 though 9: File Formats Supported by Windows Media Player Versions 6.0 and Later.Īs you mentioned, you can check which codecs are installed using Windows Media Player following the instructions in the WMP FAQ: The original is not accessible anymore, but at least it's in the Internet Wayback Machine. Microsoft used to have a page titled File types supported by Windows Media Player that listed supported files types for Windows Media Player version 7 through 12. I didn't find a page that lists specific codecs, unfortunately.
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