IO Labs — Flux Sequencer

• Manual PDF

Download the FLUX Manual PDF

Using FLUX to Create Distorted Percussive Sounds, Crazy Basslines, and Haunting Pads

The FLUX module by IOLabs is an exceptionally deep and flexible sequencer/modulation source for Eurorack, based on Temporal Modulation Synthesis® and packed with advanced modulation, logic, and CV/gate possibilities. Here's how you can exploit its architecture for the type of sounds you want:

General Modulation Approaches in FLUX

FLUX offers three primary modulation sources: - Macro Pots (Manual Potentiometers) - CV Inputs (Four Assignable Jacks) - Evolve LFOs (85 Internal Per-Parameter LFOs, Savable Per-Preset)

You can mix and match these sources using the modulation matrix and three color-coded mod buses (Yellow, Grey, Purple), assignable per-step!

Setting up Modulation

• Quick Setup: In the Main UI, select a parameter, then hit the MOD button to jump directly to its modulation nodes (Evolve, Macro, CV in sequence).
• You can modulate virtually any parameter per step and per channel: density, curve, value, phase, gate, humanize, mask, CV min/max, envelope, LFO params, quantization, etc.
• The Evolve LFO engine offers multiple waveforms—including various random, square, and triangle types, as well as bipolar (invertible) shapes for more expressive changes, plus a VCA-style dry/wet per LFO to control depth or automation.
• Macro Pot mapping and CV input mapping are via attenuverters for positive or negative modulation of each parameter.

Distorted Percussive Sounds

Parameter Tricks

• Density (DENS) & Compression (COMP): Push trigger density high and use negative compression/expansion to cause rapid fire/flammed triggers—increase distortion or overdrive in following drum modules.
• Humanize (HUMA), Mask, Phase (PHAS): Add randomness for organic "broken" distortion.
• Gate Lengths (GATE): Short/long gate times create clicky versus smeared/overdriven pulses.
• CV Outputs: Modulate VCA envelopes controlling drum VCAs, introduce random or envelope-controlled transients.
• Auxiliary Outputs in Boolean Modes: Use AND, OR, XOR logic to interleave or alternate triggers unpredictably.
• Random LFO on Accent/CV Out: Assign a random or triangle LFO to trigger amplitude tweaks, pitch modulation, or even FM input on external voices for noisy, gnarly percussion.

Patch ideas:

• Use a single-step pattern with high density (DENS > 32), long length (LENG > 8), then automate VAL with an LFO for moving between clustered and spread hits.
• Layer two percussion voices (e.g., kick/snare) and use different masks and phase offsets; modulate which AUX output is performing logic like AND/OR for trigger interplay.
• Send envelope CV out to a wavefolder or distortion module gated by a random or square LFO pattern for crushed, broken percussive textures.

Crazy Basslines (Dubstep, DnB, Neuro)

Parameter Tricks

• TM Curve (CURV) and Value (VAL): Skew bass notes or rhythmic triggers unpredictably for that chopped/jerky feel—modulate with triangle or sample-hold LFOs.
• CV Modulaton: Assign LFO, AR-envelope, or even random S+H voltages to filter cutoff or oscillator pitch of your bass voice. Use frequency-synced LFO modulation for classic dubstep LFO-wobble.
• Quantization (QUAN): For more chaotic basses, reduce quantization steps or leave only a few nodes active per octave for "broken" scales.
• Macro Pots: Use a macro to sweep filter cutoff, FM depth, or wavefold amount in real-time over evolving step sequences, then automate macro depth to create performance macros.
• Burst Mode: Use Burst mode with triggers controlled externally—they allow you to retrigger steps/basses for re-syncs or fills typical in DnB.

Patch ideas:

• Automate step CV out mode to LFO, sync it to step/trig, and send to a resonant LPF or VCF on your bass synth. Assign Evolve LFO (triangle or random) to MAXV and MINV for fluctuating LFO depth, mimicking modern growl bass modulations.
• Use step-specific quantization and mask with macro/CV assignment to "mute" or "ghost" notes, yielding syncopated, chopped grooves.
• Utilize auxiliary outputs set to chained logic modes to generate stuttery gate patterns for gating distortion or bitcrush on your bass voice.

Haunting Atmospheric Pads

Parameter Tricks

• Long Envelope Mode (ENV+/ENV- on CV Out): Program step CV outs as long AR envelopes modulated by Evolve LFOs with slow triangle/sine shapes for evolving textures.
• CV Output Range (MINV, MAXV): Automate the voltage range per step to create shifting timbres—perfect for morphing pads.
• Phasing, Compression (COMP): Use subtle negative compression and phase modulation to produce drifting, ambiguous attacks for each trigger—think smearing granular textures.
• Humanize/Mask: Add low-level humanize and complex mask steps for unpredictable ambience.
• Quantization Nodes: Turn on only certain intervals per step for modal, non-Western, or ambiguous harmonies.
• LFO’s VCA Dry/Wet: Fade in/out modulation depth per LFO over time with the per-parameter VCA control, creating swelling/ebbing textural movement.

Patch ideas:

• On a dedicated channel, sequence long 8+ step patterns with low density and widely spaced triggers. Set CV Out to AR envelope, modulate release/attack times with Evolve LFOs, and use the pad's CV to modulate reverb/delay on your effects to simulate distant, breathing atmospheres.
• Randomize quantization nodes and automate CV range per step so each new chord or drone step is harmonically ambiguous and morphing.
• Stack multiple CV outs routed to different oscillators’ timbral controls, each with different LFO/ENVELOPE settings, for evolving polyphonic pads.

Advanced Tactics

• Boolean Logic for Surprises: Use AUX logic modes (&, ||, x||, etc.) for pseudo-generative triggers—ideal for both glitchy percussion and unpredictable pad textures.
• Step-by-Step Wild Variation: Use ALL mode to initialize patterns, then go off ALL and hand-edit irregularities—good for "almost repetitive" sequences that trick the ear.
• Macro + Mod Matrix Automation: Assign multiple parameters to a single Macro or CV input for one-knob (or envelope) deep transformations across the entire patch.

Additional Resources

• Full FLUX Manual PDF (Official)

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