User Manual

SPECTRALIS 2

FbFs:

The individual filterbands of the filterbank consist of cascaded filterstages.

The bandpass-filter response curve - which is the result of all cascaded

filters – can be changed by adjusting the frequencies of the cascaded

stages. This parameter decreases the lower stages frequency and increases

the higher stages frequency . By using both parameters – quality and

spread of the partial bands – it is possible to vary the soundcharacter of

the filterbank substantially.

Next push the [Page-Up] button to go to the next menu page:

2/2 Filterbank Main Volume Envelope

Att:7 Dcy:60 Stn:204 Rls:65

Att (attack), Dcy (decay), Stn (sustain), Rls (release)

You are probably already familiar with the envelope parameters.

Menupage 2 shows the envelope parameters for the filterbank amplifier.

We won’t need these parameters right now, but you should memorize

that the filterbank has an additional envelope controlled Amplifier for

it's output. If the envelope amplifier bypass is not opened and the filterbank

is not triggered by the analog part, the output of the filterbank will create

nothing more than silence.

A later chapter will demonstrate how to create filterbank rhythms using

noise, the filterbank and the stepsequencer. The settings already done in

this chapter are a good starting point for this basic stepsequencer lesson.

You may want to have a look into the filterbank rhythms chapter in the

stepsequencer section.

3.3.8 The envelopes of the Spectralis analog synth

In addition to the usual attack, decay, sustain and release parameters the

envelopes of the analog synth have an additional parameter hold-time, which

directly follows the attack-phase. You can get to the filter envelopes by pushing

the (EG-Depth) button. The post filter VCA- and VCF-envelopes of both

analog filters are distributed on four parameter pages.

As an addition to the envelope edit pages in the VCO, fixed filterbank and

VCF sections, we have created duplicates for all volume-envelope edit pages

in a special envelope edit menu located in the VCA section. Pushing the (EG-

Balance)-button opens the envelope edit page duplicates.

You may instantly notice an arrow symbol close to the decay parameter label.

This arrow indicates you can select an additonal menu page with the

corresponding encoder button. Depending on the selected envelope the message

might look something like:

1/8:VCO1 Volume Envelope Generator Page2

Hld:0 Byp:0

Using the additional parameter ”Hold” forces the envelope to remain at the

maximum level of the attack phase before entering the decay phase for an

Hybrid engine - The fixed filterbank