Audio Specifications and Standards
From UA Libraries Digital Services Planning and Documentation
(Difference between revisions)
| Line 13: | Line 13: | ||
===Technical Information:=== | ===Technical Information:=== | ||
====Default File/Output Settings==== | ====Default File/Output Settings==== | ||
| - | * <u>masters | + | * <u>masters</u>: .wav at 24-bit/44.1khz |
**''note: [http://www.iasa-web.org/special_publications.asp IASA TC-04] calls for a minimum sampling rate of 48kHz (preferably 96kHz) [http://www.jazzpoparkisto.net/audio/audio32.html]. We will discontinue use of 44.1kHz sampling rates pending confirmation of appropriate storage space as 24/48 vs 24/44.1 should yield only an 8% increase in space requirements.'' - arora, 051309 | **''note: [http://www.iasa-web.org/special_publications.asp IASA TC-04] calls for a minimum sampling rate of 48kHz (preferably 96kHz) [http://www.jazzpoparkisto.net/audio/audio32.html]. We will discontinue use of 44.1kHz sampling rates pending confirmation of appropriate storage space as 24/48 vs 24/44.1 should yield only an 8% increase in space requirements.'' - arora, 051309 | ||
**typically, 2s of silence is left or created at the beginning of each .wav, with 1s at the end. | **typically, 2s of silence is left or created at the beginning of each .wav, with 1s at the end. | ||
**RMS levels are typically set fairly low, to -25db | **RMS levels are typically set fairly low, to -25db | ||
| - | * deliverables: Real Audio 8 at 16-bit/44.1kHz, 105 kbps (stereo) | + | * <u>deliverables</u>: Real Audio 8 at 16-bit/44.1kHz, 105 kbps (stereo) |
** in the near future, our workflow will allow for some enhancement of the Real Audio files (dynamic range compression, higher RMS levels) in order for delivery of pragmatic derivatives; with the preservation .wav file unaffected by such enhancements. | ** in the near future, our workflow will allow for some enhancement of the Real Audio files (dynamic range compression, higher RMS levels) in order for delivery of pragmatic derivatives; with the preservation .wav file unaffected by such enhancements. | ||
Revision as of 14:27, 14 May 2009
Contents |
Sound Forge 9.0 (Sony):
Introduction:
The following provides a brief overview of our standard audio specifications.
Technical Information:
Default File/Output Settings
- masters: .wav at 24-bit/44.1khz
- note: IASA TC-04 calls for a minimum sampling rate of 48kHz (preferably 96kHz) [1]. We will discontinue use of 44.1kHz sampling rates pending confirmation of appropriate storage space as 24/48 vs 24/44.1 should yield only an 8% increase in space requirements. - arora, 051309
- typically, 2s of silence is left or created at the beginning of each .wav, with 1s at the end.
- RMS levels are typically set fairly low, to -25db
- deliverables: Real Audio 8 at 16-bit/44.1kHz, 105 kbps (stereo)
- in the near future, our workflow will allow for some enhancement of the Real Audio files (dynamic range compression, higher RMS levels) in order for delivery of pragmatic derivatives; with the preservation .wav file unaffected by such enhancements.
Associated Hardware
Resources and Links:
- TAPE (Training for Audiovisual Preservation in Europe). European Commission on Preservation and Access, Amsterdam, The Netherlands.
- Capturing Analog Sound for Digital Preservation: Report of a Roundtable Discussion of Best Practices for Tranferring Analog Discs and Tapes. (2006) Council on Library and Information Resources and Library of Congress, Washington, D.C.
- Sound Directions - project website, maintained by Indiana University Digital Library Program.
- Sound Directions: Best Practices for Audio Preservation. (2007) Casey, Mike & Bruce Gordon. Bloomington, IN/Cambridge, MA.
- Grammy foundation® Basic Methodology for Preservation, Conversion and Archiving Recorded Media. (revised 2008) Grammy Foundation, Santa Monica, CA.
