Related Manuals for Intellijel Quadrax
Summary of Contents for Intellijel Quadrax
- Page 1 Quadrax 1.1 Manual Quadrax (Including Optional Qx Expander) 4-Channel CV-Controllable Function Generator With Cycling, Pulse Burst Generation and Morphing LFO Firmware Version: 1.1 Manual Revision: 2020.03.04...
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Page 2: Table Of Contents
Quadrax 1.1 Manual Table of Contents Compliance Installation Installing Your Module Connecting the Optional Qx Expander Module Overview Quadrax Front Panel Controls Inputs and Outputs Channel Mode Options AD Mode AHR Mode CYCLE Mode BURST Mode LFO Mode... - Page 3 Quadrax 1.1 Manual Making CV Assignments Enter/Exit CV Assignment Mode Programming the CV Matrix Clearing CV Assignments Using the Optional Qx Module EOR/EOF for AD Mode EOR/EOF for AHR Mode EOR/EOF for CYCLE Mode EOR/EOF for BURST Mode EOR/EOF for LFO Mode...
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Page 4: Compliance
(2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by Intellijel Designs, Inc. could void the user’s authority to operate the equipment. Any digital equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. -
Page 5: Installation
Installation Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power supply. We recommend you use Intellijel cases and power supplies. Before installing a new module in your case, you must ensure your power supply has a free power header and sufficient available capacity to power the module: ●... -
Page 6: Installing Your Module
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: If you are using another manufacturer’s power... -
Page 7: Connecting The Optional Qx Expander Module
6-pin I2C connector on the Qx and the other end to either of the two I2C ports on your Quadrax module (it doesn’t matter which of Quadrax’s two I2C ports you use). Be sure to align the red stripe with the white line on the Qx circuit board. -
Page 8: Overview
Quadrax 1.1 Manual Overview The Intellijel Quadrax consists of four independent, CV-controllable channels, each of which can be configured to perform any one of the following functions: ● an AD (Attack, Decay) envelope ● an AHR (Attack, Hold, Release) envelope ●... - Page 9 1 v/oct CV inputs enable you to use LFO and Burst modes as oscillators. Quadrax remembers its current state (Mode and CV assignments, channel links, etc) and retains that state even if power is removed, meaning Quadrax will always turn on in exactly the same state as you last left it.
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Page 10: Quadrax Front Panel
● BURST Mode : The RISE knobs sets the rate at which pulses are generated within the burst envelope. When the RISE knob is fully counter-clockwise, Quadrax generates pulses at a rate of 0.05 Hz, and when fully counterclockwise at about 3.33 kHz. BURST Mode - In Detail later in this manual for more information. - Page 11 Quadrax 1.1 Manual ● LFO Mode : The RISE knob functions as a RATE knob for the LFO. With nothing patched into the TRIG input, the LFO is free-running and the knob sets the LFO rate from 0.05 Hz (20 sec) when fully counterclockwise to around 3.33 kHz (0.3 ms)
- Page 12 Quadrax 1.1 Manual SHAPE knob. For the ALTERNATE LFO (a Low Frequency Vacillator), the FALL knob becomes a VARIANCE knob, setting the maximum amount of variance for each vacillation. These are detailed in the LFO Waveshapes and Morphing section, later in this manual).
- Page 13 Quadrax 1.1 Manual ● In BURST Mode : The knob shapes the overall burst envelope plus the waveform of each pulse within that envelope. For more information, see BURST Mode - In Detail , later in this manual. ● In LFO Mode : The knob controls the LFO shape, which is further defined by the FALL knob.
- Page 14 Quadrax 1.1 Manual 6. MODE/DESTINATION button - This button (x4) has several functions: In normal operation, it selects the channel’s MODE, while in CV Assignment mode, it sets the DESTINATION (and attenuversion) of the CV input. Additionally, long-pressing the button toggles the current mode between its STANDARD functionality and its ALTERNATE functionality.
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Page 15: Inputs And Outputs
5V or 10V (with 10V being the factory default). To change this setting: 1. Hold down Channel 4’s MODE/DESTINATION ( LEVEL ) button while you power on the module. This puts Quadrax into System Mode 2. Press the CV A... - Page 16 Quadrax 1.1 Manual CV inputs track 1 v/oct, so (for STANDARD LFO and BURST modes), it’s possible to use Quadrax as an oscillator by sending pitch CV to a CV input, and using it to control the RISE function).
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Page 17: Channel Mode Options
Quadrax 1.1 Manual Channel Mode Options Each of Quadrax’s four channels can be assigned to operate in one of five modes: Pushing the MODE button repeatedly cycles through the various mode options. AD Mode When the MODE... -
Page 18: Ahr Mode
Quadrax 1.1 Manual AHR Mode When the MODE button is , the channel acts as an Attack/Hold/Release envelope, where RISE controls the envelope’s attack time and FALL controls its release time. The attack portion of the envelope is triggered by the rising edge of a gate signal sent to the corresponding TRIG input. -
Page 19: Cycle Mode
Quadrax 1.1 Manual CYCLE Mode When the MODE button is green , the channel produces a cycling AD envelope, which behaves like a unipolar LFO. The frequency of the cycle is determined by the overall sum of the RISE and FALL times. -
Page 20: Lfo Mode
Quadrax 1.1 Manual LFO Mode When the MODE button is magenta , the channel operates in LFO mode. In this mode, the channel becomes a bipolar LFO, with the RISE knob controlling LFO RATE , the SHAPE knob selecting WAVESHAPE , and the FALL knob controlling a MORPH function that varies the waveshape. -
Page 21: Channel Link Options
Channel Link Options Though it’s perfectly acceptable to think of Quadrax as four completely independent function generators, the module features several ways to link these channels together. Use the LINK button (together with the TRIG inputs) to fire off multiple functions with a single trigger, or to create complex envelope shapes and rhythms using multiple triggers. -
Page 22: Trigger Link
LFO mode triggers an EOR every time the LFO completes half its cycle, while in ALTERNATE LFO mode, the EOR is high whenever the LFO voltage is moving in a negative direction. For a complete description of exactly when EOR and EOF are triggered for each of Quadrax’s five modes, see Using the Optional Qx Module , later in this chapter. -
Page 23: End Of Fall Link
EOF every time the LFO completes a full cycle, while in ALTERNATE LFO mode, the EOF is high whenever the LFO voltage is moving in a positive direction. For a complete description of exactly when EOR and EOF are triggered for each of Quadrax’s five modes, see Using the Optional Qx Module , later in this chapter. -
Page 24: Burst Mode - In Detail
RISE (PULSES) knob: In Burst Mode, the RISE knob functions as RATE knob. It sets the rate at which the pulses repeat during the length of the pulse burst. When the RISE knob is fully counter-clockwise, Quadrax generates pulses at a rate of 0.05 Hz, and when fully counterclockwise at about 3.33 kHz. - Page 25 With the knob in the clockwise position, individual pulse amplitudes rise over the burst length. At the noon position, maximum pulse amplitude occurs at the midpoint of the burst envelope. The amplitude of the highest pulse is equal to Quadrax’s maximum voltage (as set in System Mode The SHAPE knob also morphs the pulse shape between square and sine (in STANDARD functionality), and between sawtooth, triangle and ramp (in ALTERNATE operation).
- Page 26 Quadrax 1.1 Manual LED : Each pulse’s intensity and the rate at which they fire can be monitored using this LED. The LED is green , indicating that the pulses are positive voltage, and the intensity of the LED indicates the absolute voltage of each pulse (higher voltage = brighter LED).
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Page 27: Lfo Mode - In Detail
LFOs, or it can be left unpatched for free-running LFOs. In LFO mode, Quadrax’s controls take on different functions depending on whether you’re using the STANDARD or ALTERNATE LFO. To toggle between STANDARD and ALTERNATE operation, long-press (>1 sec) the channel’s MODE/DESTINATION... - Page 28 Quadrax 1.1 Manual FALL (MORPH) knob: In STANDARD LFO mode, the FALL knob becomes the MORPH knob. It’s used to create numerous interesting and morphable variations on the basic waveform set by the central SHAPE knob. These variations are detailed in the...
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Page 29: Multiple Beat Synchronized Lfos
Quadrax 1.1 Manual Multiple Beat Synchronized LFOs Here’s an example of how you can beat-synchronize multiple LFOs using a single TRIG input: 1. Set Channels 1 and 2 to LFO mode by pressing each channel’s MODE button until it’s magenta 2. -
Page 30: Standard Lfo Waveshapes And Morphing
Quadrax 1.1 Manual STANDARD LFO Waveshapes and Morphing The following chart shows how the FALL (MORPH) knob and the SHAPE knob work together to create numerous LFO wave shapes. All shapes are continuously variable, and the examples shown here are merely snapshots. -
Page 31: Lfo Mode (Alternate)
LFO Mode (ALTERNATE) In ALTERNATE operation (accessed by long-pressing (>1 sec) the channel’s MODE/DESTINATION button when in LFO Mode), Quadrax’s LFO becomes a Low Frequency Vacillator (LFV). In this mode, the oscillations are not repeatable, but chaotic —... - Page 32 Quadrax 1.1 Manual knob clockwise multiplies the clock rate, achieving a rate 64 times faster than the incoming clock when fully clockwise. FALL (VARIANCE) knob: In ALTERNATE LFO mode, the FALL knob becomes the VARIANCE knob. It’s used to set the extent to which the voltage target for each cycle changes from the previous cycle.
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Page 33: Making Cv Assignments
NOTE: Quadrax’s CV inputs track 1 v/oct, so (for STANDARD LFO and BURST modes), it’s possible to use Quadrax as an oscillator by sending pitch CV to a CV input, and assigning it to control the RISE function). -
Page 34: Programming The Cv Matrix
Quadrax 1.1 Manual Programming the CV Matrix For each channel, you can assign any or all of the CV inputs to any or all modulation destinations. Furthermore, you can attenuvert the amount of CV used to modulate each destination. In theory,... - Page 35 Quadrax 1.1 Manual 4. Repeatedly press the MODE/DESTINATION button to change the amount by which the input CV affects the parameter. There are four levels of attenuation, indicated by the brightness of the button. A fully lit button indicates 100% of the CV input value is used to modulate the parameter. The button grows progressively dimmer as more attenuation is applied (meaning CV has less effect on the destination).
- Page 36 Here is a recap of what the various button colors indicate in CV Assignment mode: 9. When you’re done making CV assignments for all channels, long-press the LINK/CV button that’s currently flashing magenta Quadrax returns to standard operating mode. Page 35...
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Page 37: Clearing Cv Assignments
); all CV assignments for a single channel; or all CV assignments for all channels. Specifically: To clear all CV assignments on a single channel: 1. Make sure Quadrax is in CV Assignment mode (as discussed in Enter/Exit CV Assignment Mode , earlier in this manual). -
Page 38: Using The Optional Qx Module
The Qx expander adds an EOR ( E nd O f R ise) and an EOF ( E nd O f F all) output to each of Quadrax’s four channels, enabling Quadrax’s envelopes, cycles, bursts and LFOs to trigger external modules. -
Page 39: Eor/Eof For Ahr Mode
Quadrax 1.1 Manual EOR/EOF for AHR Mode If a channel is set to AHR mode, then the EOR and EOF outputs perform as follows: ● EOR : End of Rise: Goes high (+5V) when the Attack portion of the envelope reaches its maximum value, and stays high until the end of the release phase. -
Page 40: Eor/Eof For Burst Mode
● EOF : Stays at 0V for the entire length of the pulse burst (set with the FALL knob on Quadrax), then goes high (+5V) at the end of the overall burst, where it stays until the next burst is triggered. This lets you trigger events in time with the start and/or stop of the burst length. -
Page 41: Eor/Eof For Lfo Mode
Quadrax 1.1 Manual EOR/EOF for LFO Mode If a channel is set to LFO mode, then the EOR and EOF outputs perform differently depending on whether you’re using the STANDARD LFO or the ALTERNATE LFO: For the STANDARD LFO: ●... -
Page 42: System Mode
Dithering should be enabled only for the handful of first-run modules that used 12-bit (rather than 16-bit DACs). In general, you should only enable dithering if instructed to do so by Intellijel. DITHER ON: The... -
Page 43: Firmware Version Display
Firmware Version Display Quadrax’s current firmware version is displayed for approximately 2 seconds when you power on the module. It displays the firmware version in binary format using the 1.x.y format, with the left column displaying the x value and the right column displaying the y value. -
Page 44: Firmware Change Log
Quadrax 1.1 Manual Firmware Change Log 1.1 (February, 2020) ● NEW : Expanded and redesigned Burst Mode replaces previous version entirely. Specifically: The RISE knob now sets the rate of pulse repetition, while the FALL knob sets the overall length of the pulse burst envelope. With the SHAPE knob in the counterclockwise position, individual pulse amplitudes decrease over the entire burst length. - Page 45 Quadrax 1.1 Manual ● NEW : System Mode for toggling global module settings (such as 10V/5V operation, or enabling/disabling dithering). See System Mode to learn how it works. ● MODIFIED : More extreme log/expo curves ● MODIFIED : 10V is the new default ●...
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Page 46: Technical Specifications
Quadrax 1.1 Manual Technical Specifications QUADRAX Width 14 hp Maximum Depth 38 mm Current Draw 106 mA @ +12V 9 mA @ -12V Qx EXPANDER Width 4 hp Maximum Depth 22 mm Current Draw 8 mA @ +12V...