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SPECTRALIS
How to...? The fixed filterbank
under the diplay and you can hear modulation with a variety of frequencies. In order
to keep the results clearly audible throughout, set the filter-frequency to middle
position with the help of the
(CutOff LP)
-encoder – in other words set it to a value
of 127. This is important as the filter-envelope in a matter of seconds will pitch the
filter-frequency way down, After raising the filter-frequency you should be able to
hear the modulation loud and clear again and a change of the modulation-frequency
will show off the advantages of the oscillator-modulation as compared to the LFO-
modulation.
Pitch the coarse tuning way down just once – let’s say to a value of minus 120. You
will now hear your typical LFO modulation-speed.
You can experiment now with a variety of waveforms. To get there push the
(Osc
Wave)
-button. Using the fourth display encoder you can shift the waveform of the
modulator continuously and seamlessly from a sine-wave (0) to a triangle wave (63)
to a sawtooth wave (127) all the way to a rectangle (255). Of course all other
adjustment possibilities that change waveforms have an effect on the filter-frequency
modulation as well. Why not give the ringmodulator a try?! Once you activate the
ringmodulator, its signal will take up the output of oscillator 4 instead of the usual
oscillator signal. Oscillator 3 and 4 are being routed into the ringmodulator.
Activating the ringmodulator can be done as follows:
Use the
[Shift]
-button, hold it down and push the
[RingMod]
-button at the bottom
right under the oscillator-section. Set the coarse tuning of both oscillators to different
values – for instance at around minus 100. Both oscillators should have at least
slightly different frequencies. This will generate modulation-patterns which are
considerably more complex than pure LFO waveforms. You can now modify them
either by adjusting the frequencies or the oscillator waveforms.
You can add a little more ”spice” by adding additional filter-modulators. You might
for instance want to add oscillator 2 as an additional modulator and set it into audio
range – while setting its modulation-depth in the filter-menu to a lower value.
3.3.7 The fixed filterbank
In the chapter: Descriptions – “The fixed filterbank” on page 15 you already have
received a brief introduction to the fixed filterbank. At this point we’re finally going to
hear what it is all about. To simplify matters we have saved a preset-sound, which
allows initial contact without too many detours. We are assuming that you are familiar
with the basic-information contained in the opening segments of the Hybrid Synth
"How to..." chapters and you should already know how to feed oscillators into the
filterbank
(push the
(Osc-Wave)
-button and dial up menu-page 3, then insert
the desired oscillators into the filterbank)
. Select sound category “Voice” in the
selection-menu and choose the “VoiceSng” preset contained in this category. The
first oscillator of this preset has been fed into the filterbank. The remaining oscillators
are not in use for this sound. Triggering notes from your midi-keyboard will produce
notes with a peculiar sound character as a result of the filterbank spectral filtering.
Next push the
[Level]
-button in the filterbank section. This button assigns the volumes
of the individual filterbands to the encoders
(1)-(10)
. Above the rotary encoders
(1)-
(16)
you can check the encoder-assignment corresponding to the activated filterbank
section. Adjusting the volume settings of the individual filterbands 1-10 results in
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