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Forthcoming Spectralis synth/sequencer details

2004-07-04 by Gene Schwartz

As a fan of the step sequencer, and especially loving synths with nice built
in sequencers, I feel compelled to post this from the Harmony Central synth
list.

These are details about the Spectralis sequencer. Of course, this synth is
not yet released - projected date is September...

The English isn't the greatest - I don't understand exactly what's meant by
some of the descriptions, but it sounds pretty interesting:

"The spectralis comes with 3 different sequencer sections:
1.) A normal Pattern Sequencer that cen be recorded in realtime or step by
step.
2.) A drum Grid sequencer for drum programming.
3.) and last but not least the step sequencer.

Section 3 is the one that can be compared with the polymorph sequencer - but
we added some new powerful features to this new one:

32 Sequencer Lines with up to 96 steps
"Mute-Step", "Trig Step", "Skip Step" and "set last step" button functions.
A step length can be set between 1/96th notes and 16 bars.
For each step you can define parameter control envelopes. These envelopes
are used for tempo based parameter changes. One can for example trigger on
step 1 an decay envelope with a length of an 8th note and on step 3 an
Attack envelope with a length of 8 complete steps. So, in the same line, the
sequencer can trigger different kinds of envelopes with different durations.
The noise Filterbank pattern is an good example for that. When you hear it,
you exactly understand, what I did there. All these sounds, that remind a
little bit of drum sounds are nothing else than bandpass filtered noise
spectras. With the step sequencer envelopes, I opened the Amplifiers behind
the different bandpass filters to create a new rhythm. This is the main
feature, which also is the reason for the name spectralis.
Each line of the sequence can have different length, direction and time
signature. So, one sequence for example can play 16th notes and the next one
can for example control the cutoff frequency - changing the filter frequency
only every 4 bars (step length 4 bars)
But this stepsequencer will not only run synchronized with the maaster
clock. For each line it will be possible to alternativly assign a controller
number or the key velocity as an step selector. Rising up a controller value
will increase the step number. Together with the glide function, which is
also available for each line, you can create very strange morphing patterns.
The stepsequencer will become a tool for doing complex realtime sound
changes with nonlinear time functions. Just imagine to control all the
filterbank bandpass levels by playing a little bit harder on your velocity
sensitive keyboard. For up to 96 velocity values one can define a complete
different filterbak volume setting.
But also all other synth parameters can be controlled with this sequencer.
You can change the waveform of an oscillator for each step or just the
detune between two oscilators. Or you can add some FM to one oscillator just
for only some dedicated steps.
The polymorph sequencer is also very powerful but can't even come close to
the stuff, the spectralis can do.
And, of course - the step sequencer can control external MIDI units as
well."

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