Filter Filosophy; Step-By-Step (Cont) - E-Mu Ultraproteus Operation Manual

STEP-BY-STEP
154

Filter Filosophy

The Instrument and the Filter work together to determine the harmonic
content of the final sound. You can think of the instrument like clay which is
being squeezed through a die, the filter. The filter tries to impress its structure
on the harmonics of the instrument.
Frequency
Response of
Instrument
Of course, the filter cannot amplify or attenuate frequencies which do not exist
in the original instrument. The Filter Frequency Tracking control can be used
to "tune in" the filter to match the instrument.
The Filter can only act on frequencies that are present in the Instrument. Use the
Filter Frequency Tracking control to "fine tune" the filter to the instrument. No sound
would be output from the example above because the filter's frequency response and
the harmonic spectrum of the instrument do not coincide.
UltraProteus Operation Manual
Filter
Instrument's
Response
Shaped by
Filter
Instrument
Spectrum
40 80 160 360
Frequency
Filter
Response
720 1440 2880