Audio Specifications and Standards

From UA Libraries Digital Services Planning and Documentation
(Difference between revisions)
Jump to: navigation, search
(Default File/Output Settings)
(Resources and Links:)
Line 46: Line 46:
 
**[http://mixonline.com/mag/audio_aeseliminating_file_exchange/ The AES31 Standard] (2001) De Lancie, Philip.  
 
**[http://mixonline.com/mag/audio_aeseliminating_file_exchange/ The AES31 Standard] (2001) De Lancie, Philip.  
 
**[http://digitalcontentproducer.com/mag/video_aes_standard/ AES31--Eliminating the File Exchange Conundrum] (2001) Lambert, Mel.
 
**[http://digitalcontentproducer.com/mag/video_aes_standard/ AES31--Eliminating the File Exchange Conundrum] (2001) Lambert, Mel.
**see also: [http://www.cs.cf.ac.uk/Dave/Multimedia/node296.html/ Open Media Framework Interchange] format (OMFI)
+
**see also: [http://www.cs.cf.ac.uk/Dave/Multimedia/node296.html Open Media Framework Interchange] format (OMFI)
 
**see also: [http://aaf.sourceforge.net/ Advanced Authoring Format] (AAF)
 
**see also: [http://aaf.sourceforge.net/ Advanced Authoring Format] (AAF)

Revision as of 13:56, 30 November 2009

Contents

Introduction:

The following provides a brief overview of our standard audio specifications.



Technical Information:

Default File/Output Settings

  • masters: .wav/WAVE 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
    • note: Our current audio suite Sound Forge does not support export/save of the preferred BWF, Broadcast Wave format (.wav). - 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: .rm/RealAudio v. 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.

Update 082809: Real Audio will not be the preferred delivery format as we began use of alternate delivery methods. MP3s will be created with the Lame Encoder using the following setting:

  % lame sample.wav sample.mp3 -V4 --noreplaygain --nohist -S

These setting were decided upon after consulting the Hydrogen Audio site.

Associated Hardware


Resources and Links:

Personal tools