Manual
Table Of Contents
- Introduction
- Supported Codecs and Formats
- The Sonnox Fraunhofer Pro-Codec
- Additional Information on Workflows
- Lossless Codecs (mp3-HD and HD-AAC)
- Description of Controls
- Presets and Project/Session Data Handling
- Preset Manager Toolbar
- Pro-Codec Signal and Control Flow Diagram
- Specifications
- Copyright and Acknowledgements
- Manual Revision History
- Platform Specific Supplement
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8
The STATUS window (see right) displays information about the
codec, including its version number. In some cases (similar to
the bit-rate table entries in the drop-down menu above), the text
may be in red, indicating a special condition.
Some combinations of bit-rate, quality setting and sample-rate
might cause an encoder to down-sample internally (especially at
the highest quality settings). In this case, if the stream is
decoded for auditioning, the number of samples per second
produced will not match the session sample rate and there will
be a pitch shift.
To work around this problem, when one of these special combinations is selected, the plug-in
creates two versions of the codec; one operating at low quality for auditioning (because it
does not internally down-sample at low quality), and one operating at high quality, which
will be used only for writing to file, and only if the user drops into online record mode.
Red text in the STATUS window of the CODEC & SETTINGS pop-up indicates this
condition.
At higher session sample rates, the STATUS window also informs the user if downsampling
is occurring. In this case, the input audio is down-sampled prior to encoding, to bring the
sample rate into the range supported by the codec. The decoded audition signal is
correspondingly up-sampled.
NOTE: The encoded file’s sample rate is derived from the session sample rate, the codec
supported sample rate, the selected codec bit-rate, the selected codec quality setting and the
channel configuration. Hence, it is not a simple process to choose a desired encoded file
sample rate. For more details, see section 4.7 Codec and Encoded File Sample Rate.
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