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Windows Media Audio File with WMA9 Lossless Codec
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Format Description Properties
• ID: fdd000099
• Short name: WMA_WMA9_LL
• Content categories: sound
• Format category: file format, bitstream encoding
• Last significant update: 2004-05-13
Identification and description
Full name | Windows Media Audio File with Windows Media 9 Lossless Codec |
Description | File format based in ASF (Advanced Systems Format) that wraps a Windows Media 9 lossless audio bitstream. |
Production phase | Used for middle-state purposes, e.g., archiving of high-quality files. |
Relationship to other formats | |
Subtype of | WMA (Windows Media Audio) |
Contains | WMA9_LL audio codec |
Local use
LC experience or existing holdings | |
LC preference | See WMA |
Sustainability factors
Disclosure | See WMA and ASF |
Documentation | See WMA and ASF |
Adoption | Not known to the compilers of this document; the WMA file format is widely adopted. The lossless codec is specialized and may not see wide adoption. |
Licensing and patent claims | See ASF for link to pages covering licensing of Windows Media and the Advanced Systems Format. |
Transparency | Depends upon algorithms and tools to read; will require sophistication to build tools. |
Self-documentation | See ASF |
External dependencies | See WMA |
Technical protection considerations | See ASF |
Quality and functionality factors (video)
Normal rendering | Good support. |
Fidelity (support for high audio resolution) | See WMA9_LL (audio codec). |
Support for multiple sound channels | See WMA9_LL (audio codec). |
Functionality beyond normal rendering | None |
File type signifiers
Tag type | Value | Note |
Filename Extension | wma | |
Internet Media Type | See WMA | |
Magic numbers | See WMA | |
ASF GUID | See WMA |
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Notes
Format specifications
URLs
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Useful references
URLs
See WMA
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Last Updated: 03/ 7/2007