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 July 24, 2008

NPR Distribution, Managers of the Public Radio Satellite System

Encoding Files for the ContentDepot®



Last updated March 14, 2008

Once you have created your master sound file, you need to encode the file into the standard ContentDepot format. To get the best audio quality, be sure to create each encoded file from the master sound file. If you are using a batch encoder, multiple conversions can be made in one session using the master sound file. You may use the tools of your choice to encode your files, but you must set the encoding parameters correctly for each ContentDepot file.

The following list gives the appropriate encoding parameters for a broadcast-quality sound file. Specific encoding parameters are not required for audition samples (MP3) submitted to the ContentDepot.

File purpose: Broadcast-Quality Sound File
File format: .mp2 (MPEG 1, Layer II)
Mode: stereo or mono
Bit Rate: 256
Sampling Rate: 44.1 KHz
Word Length: 16 bit
Frame Padding: Must be turned off

If you are not familiar with digital sound file encoding, our online training modules can get you started.

Encoding Tools

The following encoding tools have been tested with the ContentDepot and can make ContentDepot-compliant files. This information does not constitute an endorsement of any of the organizations or products listed, and all content is subject to change.

Product Platform Compliance
Adobe Audition V1.5 Windows, Mac MP2 plugin available http://www.qdesign.com
Awave V9.1 (FMJ-Software) Windows Compliant
BarbaBatch Mac OSX Can produce ContentDepot compliant files with a software upgrade
CD Audio Extractor 1.51 Windows Compliant with ID3 tags turned off
CDex V1.51 Windows Can produce ContentDepot compliant files if you turn off ID3 tags. Free download available
CD Extractor Pro (Prophet Systems) Windows Compliant
Cool Edit 2000 1.1 Windows Compliant
ENCO Windows, Mac Under evaluation.
PRX Encoder 2.0 Windows, Mac OSX Can produce ContentDepot compliant files using version 2.0. Can be downloaded at no charge from the PRX site for public radio use. (Go to "help" and look for member tools.)
Smart Audio Converter Windows Compliant
 

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