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FS1 Installation and Operation Manual — Cabling the System
FS1 Audio Level
Choices—Pro or
Consumer
Since the FS1 handles both digital and analog audio and can convert between the two,
it provides settings via the Parameter Menus and the remote web browser that allow
you to control the relationship between audio level in analog versus the same audio
level in the digital domain. The FS1 offers four settings to accommodate these different
audio relationships in both professional and consumer audio applications.
The audio levels listed in the following table are defined in reference to 0 dBFS (where
FS = full scale), which is the maximum level that can be represented digitally.
Note:
the measurements mentioned here are made using a 1kHz sine wave.
FS1 Professional Audio Level Settings
FS1 Consumer Audio Level Setting
FS1 Audio Setting
Meaning
+24 dBu analog = 0 dBFS SMPTE standard
With digital audio at maximum possible level
(before clipping), the expected analog audio
input level is +24 dBu, and the output will be
scaled to this level.
+18 dBu analog = 0 dBFS EBU standard
With digital audio at maximum possible level
(before clipping), the expected analog audio
input level is +18 dBu, and the output will be
scaled to this level.
+15 dBu analog = 0 dBFS
With digital audio at maximum possible level
(before clipping), the expected analog audio
input level is +15 dBu, and the output will be
scaled to this level.
FS1 Audio Setting
Meaning
+12 dBu analog = 0 dBFS.
With digital audio at maximum level (before
clipping), the analog audio input level will be
+12 dBu, and the output will be scaled to
this level.
These levels are provided for consumer
equipment that outputs audio at levels lower
than the professional levels.
Note: In the consumer audio world, units are
often given in terms of dBV, so +12.2dBu is
equivalent to +10dBV. The standard
operating level then corresponds to -10dBV
(-7.8dBu). The "+12dBu" FS1 setting
provides consumer audio levels with
headroom.