User Manual

SPECTRALIS 2

Hybrid engine - The fixed filterbank

the sustained note simply by playing another key on your keyboard (or the

MINI-keyboard of the Spectralis) without simultaneously pushing the

[Hold]-Button.

At this point you should play around some with the ”Modulator”-oscillator 4.

To do so push the (OSC-Detune)-encoder button and - by using [Page-Up]-

button select - the menu for adjusting the tuning “Coarse-Tune”. Make changes

now with the fourth encoder 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.