49
SPECTRALIS
4/6:LP Cutoff
Att:0 Dcy:71 Stn:137 Rls:70
Now you can control the most essential functions of the 24 dB lowpass. Just play around
for a while with all the functions described so far. This way you will get a good feel for the
sonic capabilities of the filter. Once you’ve had your fill, we can move on with this chapter.
In case you are wondering why the tone stops abruptly when you release the keyboard,
even with the Release (”Rls”)
set to it's maximum value you may want to go back two
pages in the menu. Here is where you will find the level envelope for the 24dB Lowpass.
If the release time is set to a low value, the tone will end despite the filter being open
because the amplifier behind the filter is at the end of the signal-path. To avoid this from
happening you should set the release-time of the 24dB lowpass level envelope to a value
of around 100!
If you’re hitting another key now with high expectations, you will still not hear a change in
the duration. In case you are now confused and start questioning the usefulness of this
chapter, you might want to re-read the introduction to the chapter. It’ll take you to a
small Sidebar:
3.3.3 Short Excursion: oscillators and envelopes
Corresponding to the introduction each oscillator has its own amp with envelope control!
If the sound stops right after releasing a key on your keyboard, it indicates that the
envelopes of the oscillators are active and have a short release-time setting. Let’s test
that theory. In the following drawing you can see a simplified sketch of the ”inside” of one
oscillator.
Directly next to the sound-source (Waveform Generation) there is an amplifier (triangle-
symbol), which is controlled by an envelope. The level controls for the individual filters
come after it!
Below the amp you will see the ”EG-bypass-signal path”. This one routes
the signal of the current waveform directly to the output volume pots - just bypassing the
volume envelope.
Corresponding there are two ways to make the release-phase of the two filter-envelopes
audible.
I.)
You can either open the EG-bypass parameter, so that the oscillator provides continuous
sound regardless of the envelope setting, or
"How to...?": Playing the "Analog"-synthesizer
Summary of Contents for Spectralis
Page 1: ...1 SPECTRALIS Spectralis...