User Manual

SPECTRALIS 2

Hybrid engine - The fixed filterbank

24/27:Noise Direct Volumes

FB:0 LP:0 MM:00 SumL:0

Turn the first encoder and adjust the filterbank level for the noise source to a

value of about 200.

Push the filter-bank [Level]-button once more and make sure that the button is

lit, as this button can also alternatively be used to exit the filterbank. If the

button does not light up just push it once more. Encoders 1-10 are now assigned

to the level of the individual frequency-bands. If you set all filter levels to 0

beside the lowpass filter and if you rise up the volume for the LP-filter output

to a high volume, the sound engine should produce a low rumbling noisefloor,

in case you have a speaker-system that is capable of reproducing such low

frequencies. In case you are not hearing anything, please check the routing

once again. Turn the encoder [12]-[15] to a value of 0 and turn the filterbank

direct volume to a value of about 200 using the encoder [11]([FB Level]).

Now create a frequency band mix with encoders 1-10. Once you have set up a nice

sounding spectral mix push one of the control buttons (1)-(10) to open the filterbank

edit menu.

1/2:Filterbank Configuration

Morph:0 FBBP:255 FbQ:0 FbFs:0

You have the following parameters available in this menu:

Morph:

Using just this one control you can change the progression of the volume

envelope for the two filterbank outputs R and L. On the next menu-page

the envelope will be available for editing with the obligatory attack, decay,

sustain and release parameters.

FBBP:

This is the previously mentioned bypass-control, which allows you to

pass the filterbank signal through an additional envelope controlled

amplifier. This menu-entry is definitely the most important one in the

filterbank menu if you start routing external signals into the filterbank.

For that process you should definitely turn up the bypass control so that

you can hear the external signal even if the analog-part is not being played.

More about this in a chapter later on. Turn this encoder up for the

upcoming experiments, to ensure constant sound from the filterbank

output.

FbQ:

This parameter changes the resonance of all filterbands. It changes the

sound of the filterbank quite dramatically – just turn the encoder and

hear for yourself how much the noise-mix can be twisted around.