Specifications

Chapter 10: Bruno and Reso 95
LPF/Voice Parameters
LPF (Low-Pass Filter)
Reso’s Low-Pass Filter is a single resonant filter
that is applied to all of Reso’s voices.
Frequency
The Frequency control sets the cutoff frequency
of the Low-Pass Filter in Hertz. All frequencies
above the selected cutoff frequency will be at-
tenuated.
The range of this parameter is from 20 Hz to
20 kHz.
Q
Sometimes referred to as resonance on synthesiz-
ers, Q adjusts the height of the resonant peak
that occurs at the filter’s cutoff frequency.
Increasing the Q increases the volume of fre-
quencies near the filter’s cutoff frequency (sup-
pressing the more remote frequencies) and adds
a nasal quality to the audio. High Q settings al-
low you to create wah-wah type effects, particu-
larly when the filter is swept with the Follower.
The range of this parameter is from 0 to 10.
Follower
The Follower is an envelope follower that allows
the filter cutoff frequency to dynamically follow
the amplitude of the source audio signal.
The range of this parameter is from a low of –10
to a high of +10. With positive values, the
louder the source audio, the higher the cutoff
frequency and the wider the filter will open for a
brighter sound. With negative values, the louder
the source audio, the lower the cutoff frequency
and the more the filter will close for a duller
sound.
The effectiveness of the Follower depends on
the filter’s Frequency setting. For example, set-
ting the Follower to +10 and selecting a low Fre-
quency setting will sweep the filter wide on loud
passages. However, if the cutoff frequency is at
its maximum, setting the Follower to +10 will
not sweep the filter at all since it is already com-
pletely open.
When used with high Q settings and a relatively
low cutoff frequency, the Follower can be used
to produce an automatic wah-wah-type effect.
Mono (Monophonic)
In this mode, Reso responds monophonically,
producing a single note even if more than one is
played simultaneously (though multiple voices
can be stacked on the same note using the Voice
Stacking parameter). Monophonic mode gives
voice priority to the most recently played note.
Poly (Polyphonic)
In this mode, Reso responds polyphonically,
producing as many notes as are played simulta-
neously (up to 24). The number of notes that
can be played simultaneously depends on the
Voice Stacking setting chosen. A voice stack set-
ting of 1, for example, will allow 24 individual
LPF and Voice parameters