E-Mu Ultraproteus Operation Manual page 225

Z-PLANE FILTER DESCRIPTIONS
204
F145 GentleRZ4
A series of unevenly spaced resonant peaks converge to a single peak as
Morph Offset is increased. The Frequency Tracking offset provides a
somewhat muted sound (with several gentle bumps in the mid-frequency
range), moving toward a flat response. Sweeping this filter produces some
very smooth wa-wa effects. Using this filter with the trumpet waves can
produce sounds suggestive of French Horns.
Morph: Modulating this sweeps filter peaks.
Freq. Tracking: Use this to control filter depth and cutoff.
Transform 2: Not used.
F146 Bendup/Swap
This complex filter features several series of tuned resonant peaks and
notches which can seem to bend up or down in pitch depending on the
settings for the various Morph, Frequency Tracking, and
Transform 2 parameters.
Morph: Use to tune the filter.
Freq. Tracking: Low values make upward filter sweeps appear to bend
pitch up. High values make pitch bend appear to go down.
Transform 2: Higher values make the filter sound more open.
F147 Bendup
This is similar to filter number 160, except that the bend is always in an
upward direction (if the Morph axis is swept in a positive direction).
Frequency Tracking can be used to tune the filter over a nearly 2-octave
range. Transform 2 is used to set the cutoff point of the lowpass filter;
higher values raise the cutoff point.
Morph: Sweeps harmonic peaks.
Freq. Tracking: Tunes the filter.
Transform 2: Increase for a brighter effect.
F148 SKWEEZIT
This filter features a complex series of peaks and notches. Varying the
Morph parameter varies the 'Q' settings for most of the peaks and notches,
while sweeping the frequency and Q of the first pole.
Morph: Sweeps one of the resonant peaks and varies 'Q'.
Freq. Tracking: Tunes the filter.
Transform 2: Controls resonance.
UltraProteus Operation Manual