Reference Manual

414 Live Instrument Reference
24.6.5 Filter Section
Operator’s Filter Section.
Operator’s filters can be very useful for modifying the sonically rich timbres created by the oscil-
lators. And, since the oscillators also provide you with the classic waveforms of analog synthe-
sizers, you can very easily build a subtractive synthesizer with them.
The filter section offers 14 different filter types including multiple varieties of lowpass, bandpass,
highpass and notch filters. The 12 and 24 dB modes refer to the amount of attenuation. The 24
dB modes attenuate the filtered frequencies to a much greater degree than the 12 dB types, and
are commonly used in the creation of bass patches. The SVF (state-variable filter) modes are 12
dB types but with a different architecture. They will self-oscillate as their resonance is increased.
The Ladder modes have 24 dB slopes and are based on the filters found in some classic analog
synthesizers.
The Envelope and Filter buttons in the filter section’s display area toggle between showing the
filter envelope and its frequency response. Filter cutoff frequency and resonance can be adjust-
ed in the shell or by dragging the filter response curve in the display area. Filter frequency can
also be modulated by the following:
•note velocity, via the Freq<Vel control in the filter’s display
•note pitch, via the Freq<Key control in the filter’s display
•filter envelope, via the Envelope control in the filter’s display.
•LFO, done either by enabling the Dest. A “FIL“ switch in the LFO’s display, or by setting
Dest. B to Filter Freq.