Noise Engineering Ataraxic Iteritas Handleiding
Noise Engineering
Synthesizer
Ataraxic Iteritas
Lees hieronder de š handleiding in het Nederlandse voor Noise Engineering Ataraxic Iteritas (4 pagina's) in de categorie Synthesizer. Deze handleiding was nuttig voor 2 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld
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Ty VCOpe
Size 10HP Eurorack
De 1.5 Inchespth
Po 2x8 Eurorackwer
+12 mA 150 / 80 (if 5v on)
-12 mA 5 / 5
+5 mA 0 / 90 ( )if 5v on
Noise Engineering
Ataraxic Iteritas
Digital Voice Inspired by the Last Millenium
āYep.ā - Patrick Leonard
Ataraxic Iteritas is an extension of the original Ataraxic Translatron. AI starts
with one of three bit tables shaped via variable interpolation that is then scrolled
through, amplitude modulated, folded, and distorted by the CV-controllable
front panel controls. Subby basses, metallic drones, unrelentingly digital timbres
and more are all to be had from the AI. Guaranteed to make the fax machine
jealous.
1
Interface
2
Pitch: An encoder knob. Adjusts the pitch of the fundamental oscillator. Default is
ļ¬ne mode: steps are sub-perception so AI is diļ¬cult to bump out of tune. Push and
turn for coarse adjustment: each step is a semitone. CV input is a 1v/8va standard
input.
Noise: Displaces samples in time, and amplitude modulates the signal by white noise.
Useful for adding an aggressive, broken edge to the output.
Comb: Changes the emphasis of the harmonic structure of the output. At 12:00 the
ļ¬lter is oļ¬. To the left, it brings out more high harmonics, and to the right, it brings
out more low harmonics.
Shape: Adjusts the interpolation between waveforms. Sonically, this ends up being
almost identical to morphing from triangle to saw to square.
Soft Fold: Soft Fold uses the following polynomial:
This is applied to a unipolar signal with gain controlling the fold amount. This
gives an asymmetric soft fold. Soft fold is useful for adding interest to simple
sounding waveforms, and works well in conjunction with the Noise knob.
Waveform: Blends between waveforms in the bit table selected by the Mode switch.
Time Mod: Similar in sound to PWM or hard sync. Modulating this parameter creates
phaser-type sounds.
Mode: Selects between three diļ¬erent sets of waveforms, arranged in bit tables. The
waveforms generated are all unique and unapologetically digital in nature. They are
then modiļ¬ed by the Shape and Waveform parameters. For more details on the
diļ¬erent modes, see the Design Notes section below.
Range: B/A/T The range switch sets the lowest note. Each position is two octaves
above its left neighbor (Bass, Alto, and Treble).
Sync: Resets the state of the oscillators on a rising edge. Used for sync
modulation.
Out: A low-impedance audio source. The output varies based on parameters as AI
compensates for loudness.
CV Inputs: All parameters are CV-able. Knobs act as oļ¬sets unless stated otherwise.
AI expects an incoming voltage of 0-5v for non-pitch parameters and 0-8v for pitch.
3
Patch Tutorial
First Patch:
Patch Out to your mixer. Play with the knobs. . Magic
Second Patch:
Apply CV to any/all of the inputs to make AI come to life. A couple of great sources of modulation are
Mimetic Digitalis and Clep Diaz. Patch a 1v/8va sequence into the Pitch input to bring out the melodic
side of AI.
Other Patching Tips:
AI pairs very well with ļ¬lters and lowpass gates. A couple of our favorites are the WMD TRSHMSTR,
the Doepfer A-101-6, and the Rabid Elephant Natural Gate. Try patching the AI out to your favorite ļ¬lter
and see how you can shape the sound.
AI also creates fantastic rhythms and textures in the subsonic range. Flip the Range switch to Bass and
turn the pitch down until you can hear the individual pulses of the oscillator. Processing this type of sound
with reverb and delay creates unique soundscapes and atmospheres.
AI started simply enough. Letās take our ļ¬rst product, Ataraxic Translatron and re-implement it on the
Iteritas hardware platform, blowing it out with more features and controls.
This simple-sounding task ended up being one of the most technically challenging things we have done.
The hardest constraint was simply sample rate. The high-order LFSR waveforms require an extremely
high sample rate to sound the way we want them to. All attempts to downsample lost their edginess. As
with all of the Iteritas oscillators, the sample rate varies by pitch, but for AI itās between 100--200khz.
Having such a high sample rate means we have about 1/4 of the per-sample processing power as on BIA
so every feature was a struggle to ļ¬t into the performance envelope.
Every tone control needed to be as simple as possible which led to a lot of the basic choices. Soft fold is
a simple quintic polynomial that will gently fold a waveform. Noise is just simple modulation by noise
in both amplitude and time domains. Time mod is a variant of the saw mod on the Manis Iteritas except
it operates on the passage of time in the waveform interpolation rather than the amplitude of the
waveform. The comb ļ¬lter was chosen because the near-ļ¬nished product was begging for a ļ¬lter but we
were almost out of computational power. Comb ļ¬lters are simple and elegant, and when we tried it, we
were so excited that we looked no further.
One of the things done for performance was to encode the waveforms AI uses into a table. This ended
up being signiļ¬cantly faster than computing it on the ļ¬y and made it easy to change the waveforms to
produce diļ¬erent modes. The LFSR tables are based on the same waveforms as in the AT (in some cases
octave-shifted diļ¬erently). SQR is a square wave that is amplitude modulated by the harmonic series so
turning the waveform knob will blend between harmonics. SQR2 is the same except the modulating
pitch goes up an octave every waveform.
In the end the AI became our most aggressive sounding oscillator. In some ways it is unreļ¬ned
compared to our other oscillators but it has an undeniable edge that we know our users are going to
love...and weāve found that pretty things can still be coaxed out of it!
Genesis and Design Notes
Product specificaties
| Merk: | Noise Engineering |
| Categorie: | Synthesizer |
| Model: | Ataraxic Iteritas |
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