Sustainability of Digital Formats
Planning for Library of Congress Collections
Sustainability of Digital Formats
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |
| Full name | RealAudio, Multichannel Codec |
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| Description | Audio compression codec for multichannel sound. RealMedia promotional literature states "targeted toward . . . home theater and multichannel entertainment systems." |
| Production phase | Generally a final-state (end-user delivery) format. |
| Relationship to other formats | |
| Used by | RealAudio_10, RealAudio, Version 10 |
| LC experience or existing holdings | See RealAudio_10 |
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| LC preference | See RealAudio_10 |
| Disclosure | See RealAudio_10 |
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| Documentation | See RealAudio_10 |
| Adoption | See RealAudio_10 |
| Licensing and patents | See RealAudio_10 |
| Transparency | See RealAudio_10 |
| Self-documentation | See RealAudio_10 |
| External dependencies | See RealAudio_10 |
| Technical protection considerations | See RealAudio_10 |
| Sound | |
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| Normal rendering | Good support |
| Fidelity (high audio resolution) | Moderate, depending upon the degree of compression. |
| Multiple channels | For 5.1 channel audio; RealAudio literature states "left, right, left-surround, right-surround, front center, and low frequency woofer." Presumably the multichannel codec can also be used for multiple channel sound not intended to represent aural space. |
| Tag | Value | Note |
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| Filename extension | Not applicable. |
See RealAudio_10 |
| Internet Media Type | Not applicable. |
See RealAudio_10 |
| Magic numbers | Not applicable. |
See RealAudio_10 |
| General | |
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| History |
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