Quadra & Expander Manual Table of Contents Table of Contents Overview Quadra Features Additional Expander Features Installation Before Your Start Installing Your Module Quadra Front Panel Controls Inputs and Outputs Expander Front Panel Controls Inputs and Outputs Functions and Envelopes...
0.5ms to over 30 seconds. The Expander enhances Quadra’s core functionality by allowing attenuated voltage control over Attack and Decay for each function generator; plus a Quadrature mode and an analog OR mixer for each function generator pair.
Quadra & Expander 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: ●...
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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Quadra & Expander Manual 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.
3. Exponential/Linear Switch - This switch (x4) changes the attack and decay curves. Depending on what you are patching the Quadra into, this setting may need to be changed. For example if you patch into an exponential VCA you’ll probably use linear mode.
Quadra & Expander Manual This is often used with sequencers. ASR is similar to an ADSR in that it continues to sustain while the input gate is high. Cycle mode acts like a unipolar LFO. 5. LED - The brighter this LED (x4), the higher the function generator’s amplitude.
Quadra & Expander Manual Expander Front Panel Controls 1. Attack CV Input Attenuator - Controls the range of CV modulation applied to the function’s attack phase. The range increases as the knob turns clockwise. Generally best results are achieved by starting at zero...
Quadra & Expander Manual 6. ENV 2 Or Amount Attenuator - Sets the level of E NV 2 into O R 1+2 . 7. ENV 3 Or Amount Attenuator - Sets the level of E NV3 into O R 3+4 .
“Function Generator”. You can use the Quadra on its own as four AD or ASR envelope generators. If you are not using a traditional keyboard controller AD mode is preferred by many since it is independent of the incoming gate times.
Linear Versus Exponential Shapes Linear Mode (switch to the right) - The Quadra makes straight lines as shown by the examples in the left column of this illustration.
Quadra & Expander Manual Quadrature Mode Quadrature Mode links the function generators into two pairs of looping envelopes that have interdependent timing. It vaguely resembles two waveforms that are phase shifted 90 degrees relative to each other (hence the “quadrature” label). Each pair is independent and functions identically, so we will concentrate on the function generator pair ...
Quadra & Expander Manual ADSR Envelope Generation Using the OR Outs By using the O R output of the Expander and triggering two paired function generators with the same trigger or gate signal, an ADSR envelope can be achieved. For example, with 1 and 2 triggered together, if ...
Patch 1: Basic Voice With ASR Envelopes This is a simple patch that uses the Quadra as two ASR envelope generators for a basic synthesizer voice. The reason ASR is chosen over AD in this example is because ASR will sustain as long as the keyboard key is held down.
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FM configuration. Quadra’s function 1 i n AD mode controls the amount of harmonics by controlling VCA 1’s level. Quadra’s function 2 a lso in AD, and VCA 2 are used for the final output volume. Make sure you adjust the pitch of VCO 1 to alter the harmonics produced by VCO 2.
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First take the sine wave output of your VCO and patch it into your VCA. Then patch the same trigger from a sequencer or other source into Quadra’s T RIG 1 and T RIG 2 inputs. Patch E NV 1 into the pitch input on your VCO, using an attenuator if the oscillator does not have an attenuator on the pitch or FM input.