E-Mu Ultraproteus Operation Manual page 255

Z-PLANE FILTER DESCRIPTIONS
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F287 AllPoleDist
Maximum shred is obtained with both Morph and Transform 2 set to 255.
Use Morph to control character of the distortion, and Transform 2 to adjust
amount. Best tracking is obtained with Key Center set to C1, and Key to
Filt. Freq. Track +127.
Morph: Higher values increase Q.
Freq. Tracking: Tunes the filter.
Transform 2: Sweeps a single pole.
F288 AllPoleDst2
Warning: This filter can easily overload.
Morph: Sweeps the frequency of a single zero.
Freq. Tracking: Lower settings rolloff highs, higher settings rolloff
lows.
Transform 2: Higher values increase overall Q.
UltraProteus Operation Manual