Sonnox Fraunhofer Codec Toolbox - Manual (Page 9)

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2. Click inside the CODEC SELECTOR to reveal the codecs, modes and bit rates available
for the current sample rate and plug-in channel configuration. This allows fast selection of
different codec/setting combinations.
• The default codec settings are AAC-LC, 256 kbps, CBR (Constant Bit Rate).
• Selected codec settings are immediately reflected in the auditioned audio signal.
• Double-click a codec, mode or bit rate, or move the mouse cursor outside of the
selector to close the window.
• Selecting VBR (Variable Bit Rate) will re-generate the bit rate list. The available bit
rates may not be the same as for CBR bit rates. In this case, the Toolbox Plug-In will
provide the closest possible match to the previously selected CBR bit rate.
3. The NMR METER (Noise-to-Mask Ratio) provides an indication of the frequency areas
where the difference between the codec output and the original input might be audible.
4. The bit-stream OVERS meter monitors the peak sample level of the output of the decoder.
This provides an indication of the potential for signal overload when the encoded signal is
decoded in an end-user’s playback device.
5. The LAUNCH MANAGER button allows you to launch the Manager directly from within the
Plug-In.
6. The INPUT/CODEC button is used to smoothly switch the audition path of the plug-in
between the selected codec output and the input signal (dithered and truncated to 16-bits).
The signal being monitored is indicated by INPUT (blue) and CODEC (green).
• By default, this button is set to the CODEC position.
7. The STATUS PANEL displays additional information about the codec. Some Codecs
specify a particular sample rate, either for some or all bit rates they support. When one of
these configurations is selected, the STATUS PANEL will specify whether up-sampling or
down-sampling is being carried out by the plug-in.
Changing the session/project sample rate can change the available bit rates for the selected
codec. In this case, the closest-possible available bit rate will be selected.
Changing the channel configuration of the plug-in can change the codecs that are available to
select. If the previously selected codec is unavailable for the new channel configuration, the codec
settings will revert to default (AAC-LC, CBR, 256 kbps).
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