User Manual

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9: SYBIL Evo
VARIABLE FREQUENCY DEESSER
SYBIL Evo is a digital equivalent of a traditional
vocal de-esser. When recording spoken or
sung material, the sibilant sounds (Ss, Ts, CHs,
and SHs) in the track sometimes (depending
on the individual performer) appear louder
than the rest of the signal. The eect can
sound unnatural and often irritating. The
solution to this problem is to compress only
the sibilants, thereby lowering their level
relative to the rest of the track. Processing a
signal this way is called de-essing.
The diagram below shows how a compressor
and a high pass filter are traditionally
configured to accomplish de-essing.
SYBIL Evo uses a digital algorithm to
implement the de-esser function. While the
details of the algorithm are quite complex, the
resulting eect is functionally equivalent to
the diagram above.
COMPRESSOR
IN
IN OUT
OUT
SIDECHAIN
INPUT
HIGH
PASS
FILTER