Thread: Carbon is not -18dBFS like normal HD? Also, how to use S/PDIF?
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Old 06-13-2021, 02:53 AM
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Default Re: Carbon is not -18dBFS like normal HD? Also, how to use S/PDIF?
dBu and dBFS are two different things, albeit connected to the same thing - calibration.

It is not inaccurate to say (in a knowledgebase article) that calibration of -18dBFS will provide +4dBu analog output, meaning unity levels are +22dBu. So if a box is capable of +24dBu it can be calibrated to -20dBFS and if there is extra "capability" it is just headroom, I have never heard of anyone wanting to calibrate lower than -20dBFS.
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