Orban OPTIMOD 6300 Operating Manual page 219

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OPTIMOD 6300 DIGITAL OPERATION
S) For a 44.1 or 88.2 kHz output sample rate, set the digital output level (step 11
on page 2-26) to approximately –0.5dBFS; this will prevent overshoots caused
by sample rate conversion. For a 48 or 96 kHz output sample rate, set the digi-
tal output level to –0.1dBFS.
At 44.1 kHz, the output samples are not exactly the same ones that the
look-ahead limiter controlled at the internal 48 kHz sample rate, so slight
overshoot can occur.
If your mastered audio is intended for transmission via a lossy codec like
AAC, MP3 or WMA, be aware that the codec's decoder may overshoot
and cause audible clipping distortion. See Setting Output/Modulation
Levels on page 1-25. If the 6300's output is applied directly to a lossy co-
dec, decrease the setting of the 6300's output level control to allow the
necessary headroom. If the 6300's output is applied to a linear PCM stor-
age medium (like a CD), it is better to use the entire dynamic range of
the linear medium by setting the 6300's output level close to 0 dBFS.
Then compensate for codec overshoots by reducing gain when you
transcode from the linear PCM recording to the codec.