RADIKAL TECHNOLOGIES Spectralis, Руководство пользователя

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SPECTRALIS How to...? The fixed filterbank
strong spectrum variations. Rolling back all levels to 0 creates silence - no signal will pass
the filterbank anymore. This behaviour is the most significant difference compared to a
normal graphic EQ.
The Spectralis allows feeding the filterbank signal either into the two analog-filters or
directly into the FX-processors or the output bus. For the preset sound "VoiceSng" the
filterbank signal has been fed into the multimode filter. By turning the
[CutOff MM] -
encoder you can tweak the sound further. We have kept the routing options as flexible as
possible. Due to the fact that the analog filters can be fed into the filterbank as well, it is
possible to generate feedback loops in the Spectralis sound engine. Used diligently you
can create totally off the wall special effects or of course kill your speakers if you overdo
it. To avoid the latter it is advisable to reduce the level of your monitor system before
starting any filterbank routing experiments.
Tip: In case you forgot about the above advice and all of a sudden – after
moving some parameters around - you are confronted with some unexpected
and annoying squeaking noises, chances are it is the result of the multitude
of routing options which as mentioned above can be used to generate feedback.
You already know a number of possible sources for feedback - both of the
analog-filters are resonating up to self-oscillation – something also referred
to “feedback”. It will be fairly easy to differentiate this noise source from
routing feedback , as the frequency of the selfresonance oscillation will change
according to the cutoff frequency. The pitch of feedback caused by routing
does not change when the cutoff frequency is altered. It might get louder or
softer, but that’s it. You should have no problem differentiating the two sources
of squeaking sounds.
When using the [Pan] -button in the filterbank-section, encoders 1-10 are functioning as
panpot-controls for the individual filterbands. You can set a separate panorama position
for each filterband, which allows the creation of pseudostereo-effects.
We will now explore some additional parameters of the filterbank. First we should select
another soundsource with more spectral content than the basic oscillator waveform, we
used so far. An ideal source is white noise. Please push the
[Osc Wave] -button and then
use the [Page-Up] -button to select menu page 3/26. There you need to set the volume of
the oscillator 1 to Zero. Now select menu-page 23/26 “Noise Direct Feed”. You should
see the following display message:
23/26:Noise Direct Feed
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