Intellijel Atlantis Manual de usuario

Atlantis Manual

Atlantis

Dual Oscillator Subtractive Synth Voice

Manual Revision: 2017.09.25

Atlantis Manual

Table of Contents

Table of Contents

Overview

Basic Features

Sound Generators

Filter

Modulators

Mixing and Output

Installation

Before Your Start

Installing Your Module

Getting Started

Quick Start

Make a sound

Audition the waveforms and filter types

Modulate the filter

Add an envelope

Try a little FM

Use a sequencer (or CV keyboard)

Basic Architecture

VCO Overview

MIX Overview

VCF Overview

VCA Overview

ENVELOPE Overview

MOD Overview

Panel Reference

VCO

Controls

Inputs and Outputs

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Atlantis Manual

MOD

Controls

Inputs and Outputs

MIX

Controls

Inputs and Outputs

VCF

Controls

Inputs and Outputs

ENV

Controls

Inputs and Outputs

VCA

Controls

Inputs and Outputs

Tips, Terms & Techniques

Noise

Sample & Hold

Sub Osc

Signal Flow

Technical Specifications

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Atlantis Manual

Overview

Atlantis is a complete analog, monophonic synthesizer voice in a single, skiff-friendly

eurorack module. It contains a carefully matched selection of the most desirable subtractive

synthesis components including: two analog oscillators (VCOs); a sub oscillator; a noise

generator; a multimode, self-oscillating resonant filter (VCF) capable of both 2-pole and

4-pole operation; a 4-stage ADSR envelope; a mixer; a voltage controlled amplifier; and an

overdrive circuit.

These components are all pre-connected behind the front panel, enabling Atlantis to

generate sound without patch cables. Furthermore, these normalized routings can be

changed instantly using any of the numerous routing switches sprinkled across the Atlantis’

front panel. This allows for all manner of useful techniques, such as pulse width modulation,

oscillator sync, linear and exponential frequency modulation (FM), low frequency (LFO)

capabilities, and even sample & hold. Musicians can thus create a tremendously wide sonic

palette without ever connecting a patch cable.

For those seeking maximum sonic control, patch points are provided to all these

components — meaning you can reconfigure Atlantis’ architecture in any way you please —

including the ability to route voltages to or from any other eurorack modules in your system.

In this regard, Atlantis becomes not just a single synth voice, but a collection of independent

modules. Need to filter the sound coming from that Intellijel Shapeshifter? Patch it into

Atlantis’ filter. Want some weirdly slewed pitch wobble injected into one of the oscillators?

Patch in an Intellijel Noise Tools.

So what is Atlantis? It’s all of the following:

● A fully featured, fixed-architecture synth that you can happily use without patch cables,

just like many traditional synthesizers.

● A semi-modular synth that enables you to override the various normalled connections,

and reroute the signal flow for experimental sound design.

● An extensible synth that allows you to enhance its sonic palette by patching in external

modules to further shape and define your sound.

● A collection of individual, high-quality synth modules — ready to combine with any and

all other modules in your eurorack system.

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Atlantis Manual

Basic Features

The following is a quick breakdown of Atlantis’ various synthesizer components, patching

and routing options:

Sound Generators

● VCO (primary): triangle core with Hard Sync, Octave switch, Linear/Exp FM and PWM.

● MOD (second VCO): triangle core with a Hard Sync option, and a Link switch to couple

its pitch to the Primary VCO.

● SUB OSC: additional oscillator with either a square or pulse wave output pitched   either

1 or 2 octaves below the primary oscillator.

● NOISE: Noise source with with either Pink and White output.

Filter

● Cascaded 4-Pole multimode (Lowpass; Highpass; Bandpass) OTA filter, switchable

between 2-pole and 4-pole.

● Special LP boost mode.

● Built in soft clipping.

● Allows for inverting ADSR mod source.

Modulators

● ADSR envelope with manual gate, and external level (velocity) control.

● Envelope has looping option, re-trigger, and selectable time range.

● Global modulation bus with four VCO waveforms, noise and S&H options.

Mixing and Output

● 27 jacks for creative and complex patching options — patch points for every synthesis

section.

● Mixer section includes an external source, which is normalled to a sinewave.

● Three position output clipping circuit.

● Output VCA has two stage clipping circuit.

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Atlantis Manual

Installation

Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and

power supply.

Before Your Start

Before installing a new module in your case you must ensure your case’s power supply has

sufficient available capacity to power the module:

● Sum up the specified +12V current draw for all modules, including the new one. Do the

same for the -12 V and +5V current draw. The current draw will be specified in the

manufacturer's technical specifications for each module.

● Compare each of the sums to specifications for your case’s power supply.

● Only proceed with installation if none of the values exceeds the power supply’s

specifications. Otherwise you must remove modules to free up capacity or upgrade your

power supply.

You will also need to ensure you have enough free space (hp)  as well as free power

headers in your case to fit the new module.

You can use a tool like ModularGrid to assist in your planning. Failure to adequately power

your modules may result in damage to your modules or power supply. If you are unsure,

please contact us before proceeding.

Installing Your Module

When installing or removing a module from your case always turn off the power to the case

and disconnect the power cable. Failure to do so may result in serious injury or equipment

damage.

Ensure the 10-pin connector on the power cable is connected correctly to the module before

proceeding. The red stripe on the cable must line up with the -12V pins on the module’s

power connector. The pins are indicated with the label -12V, a white stripe next to the

connector, the words “red stripe”, or some combination of those indicators.

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Atlantis Manual

Most modules will come with the cable already connected but it is good to double check the

orientation. Be aware that some modules may have headers that serve other purposes so

ensure the cable is connected to the right one.

The other end of the cable, with a 16-pin connector, connects to the power bus board of

your Eurorack case. Ensure the red stripe on the cable lines up with the -12V pins on the

bus board. On Intellijel power supplies the pins are labelled with the label “-12V” and a thick

white stripe:

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Atlantis Manual

If you are using another manufacturer’s power supply, check their documentation for

instructions.

Once connected, the cabling between the module and power supply should resemble the

picture below:

Before reconnecting power and turning on your modular system, double check that the

ribbon cable is fully seated on both ends and that all the pins are correctly aligned. If the

pins are misaligned in any direction or the ribbon is backwards you can cause damage to

your module, power supply, or other modules.

After you have confirmed all the connections, you can reconnect the power cable and turn

on your modular system. You should immediately check that all your modules have powered

on and are functioning correctly. If you notice any anomalies, turn your system off right away

and check your cabling again for mistakes.

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Atlantis Manual

Getting Started

If your previous experiences with learning to use synthesizers involved stepping through

presets, then you’re in for a shock — and a treat! Atlantis has no presets. Like modules and

synths of yore, the parameters on Atlantis are meant to be tweaked, twiddled and performed

in real time. The sound it generates correlates directly with the settings on its front panel —

there is no such thing as patch memory. What you see is what you hear.

While this makes Atlantis infinitely rewarding to sound designers and synthesists, it can be

slightly daunting to new users, since at least a modicum of basic knowledge is required to

coerce it into making the sounds you hear in your head.

In this Getting



Started



 section, you’ll jump right into making sound, while simultaneously

getting comfortable with Atlantis’ front panel and layout. From there you’ll learn a bit about

Atlantis’ architecture and some fundamentals of subtractive analog synthesis before delving

into the Reference



 section, where you’ll find a more detailed discussion of Atlantis’ many

features and capabilities.

Quick Start

Make a sound

1. Connect the jack labelled OUT to your system’s audio output.

2. Set all sliders to their minimum (bottom) positions.

3. In the MIX section, set the leftmost slider (PULSE) to its maximum.

4. In the VCO section, make sure SYNC is off (switch position at the bottom).

5. In the VCF section, set the FREQ slider to its maximum.

6. In the VCA section, set the ENV/GATE switch to the “GATE” position.

7. Push the GATE button (small red button beneath the ENV/GATE switch). You should

hear a sound that sustains for as long as you hold the button.

8. In the VCO section, rotate the OCTAVE and FINE knobs to tune the oscillator as you

like.

Audition the waveforms and filter types

1. In the MIX section, raise and lower all the sliders and make note of how the sound

changes as different waveforms are mixed together in varying amounts.

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Atlantis Manual

2. In the VCF section, set the top switch to “LP,” the POLES switch to “2,” and turn on LP

BOOST. Raise and lower the FREQ slider, and notice how the filter is removing high

frequency content.

3. In the VCF section, set the RES slider to its midpoint, then raise and lower the FREQ

slider. Notice how the filter’s cutoff frequency is now more pronounced.

4. While still in the VCF section, experiment with different settings of the LP/BP/HP switch

and the 2-POLE/4-POLE switch. Notice how these change what frequencies are being

filtered and how “steep” the filter sounds.

Modulate the filter

1. In the MIX section, set the leftmost slider (PULSE) to its maximum, and set all the other

MIX section sliders to their minimum.

2. In the VCF section, set the filter type to  “LP,” the POLES switch to “4” and set all the

sliders to the bottom, except FREQ, which you should set at the midpoint.

3. In the MOD section, set the VCO/LFO switch to “LFO;” set the RATE fader to the

midway point, and use the TYPE knob to select a triangle wave.

4. Back in the VCF section, raise the MOD slider to its midpoint. Notice that the filter’s

cutoff frequency is now being modulated by the MOD oscillator.

5. Back in the MOD section, raise and lower the RATE slider to change the rate at which

the LFO modulates the filter’s cutoff frequency. When finished, go to the VCF section

and reduce the MOD slider back to minimum.

Add an envelope

1. In the ENVELOPE section, set the CYCLE switch to its OFF position, and the x1/x10

switch to the “x1” position. Set the A (attack) and S (sustain) sliders to the bottom, and

the D (decay) and R (rate) sliders to the top.

2. In the VCA section, set the ENV/GATE switch to “ENV.”

3. Push the red button beneath the ENV/GATE switch and notice how the sound no longer

sustains indefinitely, but decays over time.

4. In the VCF section, set the filter type to “LP,” the POLES switch to “2” and set all the

sliders to the bottom, except FREQ, which should be about one-third of the way up.

5. Set the ENV POLARITY switch to the right (normal polarity) and press the red button in

the VCA section. You are probably hearing a fairly dark, quiet sound. If you don’t hear

anything, try increasing the FREQ slider until you just barely hear some signal passing

through the filter.

Page 9

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