TC Electronic MD3 TDM - Manual (Page 21)

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MD3-TDM / 19
BRICKWALL LIMITER
GETTING STARTED
The BrickWall limiter cannot prevent destruction of dynamic range from happening at
earlier stages in the production process, but it can get rid of the signals we know are
going to get distorted in consumer CD players, radio processors or data reduction
codecs.
Precision in Level and Time
The BrickWall limiter operates with extended precision in both level (48 bit through-
out) and time (5 times oversampling). Double precision calculations are always used,
while hyper-precision in limiter timing can be turned
on or off using the Upsample key.
Level meters are always upsampled in order to identify intersample and 0dBFS+ peaks
on Inputs as well as Outputs. The meter scale is extended to +3dBFS because exces-
sive level normally falls between 0 and +3dBFS, and
most consumer equipment already exhibits severe distortion at +0.5 dBFS.
We recommend using the BrickWall limiter in Upsample mode. However, if you wish to
just limit the signal based on sample by sample values like a normal digital limiter,
the function can be turned off. When turned off the limiter does
not protect against 0dBFS+ peaks from occurring.