E-Mu MORPHEUS Operation Manual page 211

F149 Lo/High4
A scattering of poles and zeros with fairly high Q settings produces
this very resonant filter. Sweeping the Morph axis produces quite
pronounced wa-wa effects in which multiple resonances are
clearly audible. Morph Offset and Frequency Tracking can be used
to tune the filter, although with Morph Offset set to 255, the filter
is essentially flat.
Morph: Positive values increase pole/zero frequencies and decrease
'Q', opening the filter entirely.
Freq. Tracking: Similar to the Morph axis, but a bit higher in pitch.
Transform 2: Not used.
F150 SbtleMvmnt4
Morphing this filter to reverse the polarity of a series of more-or-
less evenly spaced peaks and notches produces an effect more
subdued than some types of filter sweeps. Using velocity or a mod
wheel (assigned through the Note-on Control section) to control
the Morph parameter can be useful when developing responsive
plucked-string instrument sounds, such as guitar.
Morph: Controls polarity of poles.
Freq. Tracking: Tunes the filter.
Transform 2: Not used.
F151 Buzzy Pad.4
This filter produces a bump at 65Hz and a rolloff above 250Hz at
low Morph values. Increasing the Morph value pushes the bump
up to about 2kHz, and the cutoff of the lowpass filter up to 20kHz.
Increasing the value of Frequency Tracking sends the bump higher
yet — up to about 8400Hz at maximum offset. The effect of
sweeping the Morph axis is similar to that of a classic 2-pole
lowpass filter with medium resonance.
Morph: Tunes the filter.
Freq. Tracking: Tunes the filter.
Transform 2: Not used.
F152 Bw5kHz+6.4
Lowpass cutoff is set to 400Hz with "0" Morph Offset. In addition,
there is a 6 dB bump at 5kHz. The bandwidth of this "bump" is
controlled by the Morph parameter. Sweeping the Morph Offset
upwards moves the bandwidth setting from very narrow to very
wide. Frequency Tracking moves the cutoff frequency of the
lowpass filter up to a maximum of 20kHz. The range of effects
available is from fairly dramatic to quite subtle.
Morph: Controls filter bandwidth.
Freq. Tracking: Controls filter cutoff.
Transform 2: Not used.
Z-PLANE FILTER DESCRIPTIONS
Chapter 11: Reference Section 201