E-Mu B-3 Instruções de Operação descarregar pdf (Página 211)

Chapter 11: Reference Section 201

Z-PLANE FILTER DESCRIPTIONS

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.

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