Omnia Audio Omnia.9/XE - Manual (Page 107)

Disadvantages
See “Disadvantages” for AAC+ in SBR mode.
Recommended Settings
Like with standard SBR, Oversampled SBR can provide “broadcast quality” results with a 64 kbps stereo
bit rate and is really the ideal setting. The Final Output Level should be set to -1.5dBFS.
Oversampled SBR is the preferred mode for 128 kbps stereo encoding and requires no Final Output
Level attenuation.
For bit rates beyond 128 kbps, we recommend standard AAC encoding be used.
WMA
Technical Details
WMA (Windows Media Audio) is a “lossy” compression technology developed by Microsoft as a part of the
Windows Media framework. Computers running the Microsoft Windows operating system are commonly
equipped with with the Standard Windows Media Audio codec (version 9.2 at the time of this writing), the
WMA10 Pro codec, or both. Which codecs are included in your particular version of Windows will
determine which encoders are available when using Omnia.9/XE. Like AAC, it is a pure transform coder.
Advantages
At one time, AAC was not supported in Flash players and WMA offered a potential compatibility
advantage. Flash players now support AAC, leaving no real advantage today to using WMA for streaming
audio.
Disadvantages
WMA is among the least efficient encoding methods. Encoding artifacts are still audible at comparatively
high bit rates.
Recommended Settings
192 kbps stereo is the minimum bit rate for “broadcast quality” audio. No reduction in the Final Output
Level is necessary; it can be left at 0.0dBFS.
Encoding artifacts are clearly audible at rates as high as 128 kbps.
Choosing an Encoding Format and Recommended Settings
107