Waldorf Lector - Manual (Page 22)

The Controls in Detail
Lector User´s Manual 22
• The Whitening filter offers an unique function: It
removes formant frequencies from choir or
voices samples. The vocoder itself creates a
formant based signal so that too much formants
within the carrier signal can interact. The
Whitening filter compensates this effect. To reduce
the brillance of the Whitening filtrer the Cutoff
parameter controls a downstreamed 6 dB lopass
filter. When Whitening is selected, all filter
parameters (except Drive) do not have any effect.
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Using the Wihtening filter could reduce the volume
of your oscillator signal.
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To understand how the Whitening filter works, create
a synthesizer sound with only one sawtooth
oscillator. Select the Whitening filter and deactivate
the filter. Turn up the Carrier parameter in the Output
section to hear the synthesizer sound while playing
MIDI notes. If you activate the filter the signal will get
more high frequencies. Ther eis no additional effect
because the sawtooth signal doesn´t contain any
outstanding formants. Deactivate the filter again and
choose the Sine shape for your oscillator. This
waveform offers only one harmonic which is
basically one formant. Acivate the filter.
You will hear: nothing! If you play some notes you
maybe hear some clicks because the Whitening filter
need a little time period to locate the formants. Now
choose a choir sample as Oscillator Shape. Here you
can hear the effect very drastically because all
formats are removed form the signal. You will also
notice a loss of volume and also some brilliance.
Resonance 0...100%
Controls the emphasis of the frequencies around the cutoff
point. Use lower values in the range of 0…80 to give
more brilliance to the sound. At higher values of 80…113
the sound gets the typical filter character with a strong
boost around the cutoff frequency. When the setting is
raised to values above 113, the filter starts to self-oscillate,
generating a pure sine wave.
Keytrack -100%...+100%
Determines how much the cutoff frequency depends on
the MIDI note number. The reference note for Keytrack is
E3, note number 64. For positive settings, the cutoff
frequency rises on notes above the reference note, for
negative settings the cutoff frequency falls by the same
amount, and vice versa. A setting of +100% corresponds
to a 1:1 scale, so e.g. when an octave is played on a