Sonnox Pro-Codec - Manual (Page 6)

2.2 Metering 2 THE PRO-CODEC PLUG-IN –AUDITIONING CODECS IN REAL-TIME
2.2.4 BitstreamLevels
Any form of filtering can, under certain circumstances,
increase the level of the signal. If your input is hot, this can
potentially produce overloads when the signal is decoded.
This effect can be very easily demonstrated with this
plug-in.
Use the TRIM tab to monitor for these overloads. The
post-decoder level of each codec is continually monitored,
and any overloads are shown on the small meters.
To compensate for these overloads, click+drag down on
the relevant TRIM dB control. The trim value is applied at
the input to the encoder, and removed after the decoder, to
allow for equal loudness signal comparison and difference
signal calculation.
Or, clickanddrag the MAX dB value onto the TRIM dB
control to apply that precise gain trim. Each time this is
done, the
MAX dB value is added to the existing TRIM dB
value.
Post-decode level overloads are still visible when the TRIM
tab is not in use, via the small overload LEDs next to the
MON buttons.
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