Noise Engineering — Integra Solum

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Noise Engineering Integra Solum: modulation ideas for aggressive percussion, basslines, and dark atmospheres

Integra Solum is not a sound source by itself; it’s a dual rotating clock divider / trigger generator. That means its real power is in how it animates other modules: envelopes, LPGs, VCAs, switches, sequential switchers, filters, distortion, sample-and-holds, drum voices, and modulation sources.

The module gives you:

• 2 independent divider sections
• 8 trigger outputs per side
• independent or shared clocking/reset
• Shift/Offset rotation per side
• 3 main modes
• /2N = powers-of-two divisions
• N = sequence of eight
• /2N+1 = odd divisions
• Wack mode for randomized trigger behavior

Important behavior to exploit

From the manual:

• Clock responds to a rising edge around 3.3 V
• One clock can normal to both sides
• Outputs update with about 70 µs latency
• Reset can be used to re-align patterns
• Output triggers are about 0–5 V, triggering around 3.4 V
• Shift rotates which jack is considered first in the cycle
• Wack mode changes the mode behavior:
• /2N becomes probabilistic divide by two
• N becomes one random trigger per step
• /2N+1 makes each output independently 50% likely on each clock

That means this module excels at: - stable rhythmic scaffolding - rotating accents - bursty probabilistic events - clock-related modulation changes - controlled chaos

Core patching mindset

Think of Integra Solum as a rhythm brain for: - when a sound happens - when a modulation changes - when distortion amount jumps - when a filter snaps open - when a voice changes pitch - when a delay or reverb gets hit

For the styles you asked about, the magic is usually:

1. Use one side for note or drum timing
2. Use the other side for modulation timing
3. Rotate one or both sides with Shift
4. Periodically Reset for phrase structure
5. Use Wack mode selectively for controlled instability

1. Distorted percussive sounds

A. Rotating industrial kick/snare pattern

Patch

• Master clock into one Clock input so both sides run
• Side A in N mode
• Patch several outputs from Side A to:
• kick trigger
• snare trigger
• envelope trigger for a VCA’d noise burst
• envelope trigger for a click transient
• Side B in /2N+1 or Wack /2N+1
• Use Side B outputs to trigger:
• distortion CV changes
• filter envelope retriggers
• wavefolder strike or VCA pings
• a sequential switch selecting different percussion sources

Why it works

Side A gives a more structured pulse stream. Side B creates asymmetry and movement. If Side B controls timbre rather than note timing, your percussion sounds like it is being “re-synthesized” each hit.

Best modulation targets

• filter cutoff CV
• resonance CV in tiny amounts
• distortion amount
• wavefolder symmetry/fold
• sample rate / bit depth on a crusher
• decay time of percussion envelopes
• switches that alternate between sine/noise/FM transients

Trick

Take one output from Side B and send it to a very fast decay envelope controlling VCA level into a distortion. Some hits slam harder, creating uneven clipped transients. That produces very alive, broken-machine percussion.

B. Broken DnB hats with probabilistic fill behavior

Patch

• Fast clock, e.g. 1/16 or faster
• Side A in /2N
• Trigger closed hats from a faster division
• Trigger open hats from a slower division
• Put Side B in Wack /2N or Wack N
• Use Side B random triggers for:
• extra hat accents
• burst generator trigger
• short noise stabs
• panning modulation envelope

Sound design tip

Send hats/noise through: - HPF - distortion - very short room reverb - compressor/saturator

Now use Integra Solum to trigger different envelope shapes for the same noise source. That creates metallic, tearing top-end.

Trick

Patch two outputs to a logic OR or mixer before a hat trigger input. Then rotate Shift. You’ll get changing composite rhythms without repatching.

C. Kick with unstable “speaker-rip” attack

Patch

• Use a kick voice or sine oscillator with pitch envelope
• Side A triggers the kick
• Side B triggers:
• an extra click envelope
• a super-short FM envelope to the oscillator pitch or phase modulation input
• distortion wet/dry or drive CV

Best mode

• Side A: /2N or N
• Side B: Wack N or /2N+1

Why it gets nasty

If the attack transient and distortion amount are triggered independently but clock-related, you get those ripped-cone, overdriven, neuro-style drum impacts.

2. Dubstep / drum & bass bassline generation

Integra Solum won’t generate pitch directly, but it can create the event structure for bass modulation. That’s often more important than the actual oscillator.

A. Reece / neuro bass motion network

Patch

Use one bass voice: - 2 detuned oscillators or a supersaw/reese source - lowpass or bandpass filter - distortion/wavefolder - VCA - maybe phaser/flanger

Timing architecture

• Side A triggers your main amp envelope
• Side B triggers changes to modulation destinations:
• sample-and-hold for filter cutoff
• sequential switch for different envelope depths
• burst or extra envelope for FM spikes
• logic module to combine triggers into growl phrases

Suggested mode setup

• Side A in N for regular phrase stepping
• Side B in /2N+1 for uneven modulation accents
• Occasionally use Wack N for random “which step gets movement”

Great CV chains

Use Side B trigger outputs to trigger: - sample & hold sampling random voltage for filter cutoff - track-and-hold on wavetable position - sequential switch choosing one of 4 modulation sources - envelope generator with varying decay amounts - clocked slew for stepped wobble contours

Result

You get bass notes that remain rhythmically anchored while their tone mutates every few steps: classic talking / snarling / neuro movement.

B. Half-time dubstep wobble with rotating accents

Patch

• Slow host clock synced to tempo
• Side A in /2N
• Use one output for note gate / VCA envelope
• Use slower outputs for filter plucks and sub drops
• Side B in N
• Patch different Side B outputs to:
• LFO reset
• envelope retrigger for filter
• accent VCA
• distortion boost
• delay send gate

Shift strategy

Turn Shift on Side B during playback. This rotates which trigger output occurs first, so the phrase changes but remains grid-locked.

Why this is especially good

Instead of modulating the bass continuously with one LFO, Integra Solum gives you discrete rhythmic gestures. That often sounds more modern and intentional in dubstep.

Patch extension

Use one trigger to reset the LFO phase on certain steps only. That creates “wobble that restarts” on selected hits, which is a strong bass design trick.

C. DnB rolling bass with ghost triggers

Patch

• Fast clock from your sequencer or Pam’s-style source
• Side A in /2N+1
• Main bass envelope on one output
• Side B in Wack /2N
• Use Side B outputs for:
• short muting envelopes to chop the bass
• FM spikes
• notch filter modulation hits
• pitch envelope retriggers for zaps

Sound design stack

• saw/reese source
• bandpass into distortion
• second filter after distortion
• sub sine layered underneath
• VCA controlled by Side A
• additional “interrupt” VCA controlled by Side B

Why it sounds DnB

The “interrupt” VCA creates those machine-gun internal articulations and ghost syncopations inside a sustained bass phrase.

D. Triggered modulation matrix for basses

This is one of the best uses of Integra Solum.

Patch

Take 4–6 outputs and assign each to trigger one event: - sample random cutoff - switch distortion type - retrigger transient envelope - open parallel bandpass - trigger short reverb send burst - switch oscillator sync on/off via VCA or logic

Then: - Side A = rhythm skeleton - Side B = modulation decorations

The bass becomes structurally repeatable but timbrally unstable, which is exactly where a lot of advanced bass music lives.

3. Haunting atmospheric pad sounds

Pads benefit less from many triggers directly hitting the audio path, and more from Integra Solum creating slow structural evolution.

A. Triggered pad animation

Patch

Create a pad voice: - 1–3 oscillators or a drone source - long attack/release envelope or sustained gate - lowpass/bandpass filter - chorus/phaser/reverb/delay

Integra Solum role

Use very slow clocking.

• Side A in /2N
• Trigger:
• long envelope retriggers
• filter contour pulses
• VCA swells
• reverb send accents
• Side B in N or Wack N
• Trigger:
• sample-and-hold for subtle pitch drift
• random panning changes
• wavefolder amount changes
• switching among modulation routings

Why it works

Pads become eerie when their changes happen discretely but infrequently. Integra Solum can create those phrase-level shifts cleanly.

B. “Breathing haunted choir” patch

Patch

• Very slow master clock
• Side A in N
• Use one output every few clocks to retrigger a long envelope
• Use another output to briefly increase filter resonance

• Use another to send a burst to reverb freeze / shimmer / feedback VCA

• Side B in Wack N

• Each random trigger step controls:
• slight FM amount burst
• sample-and-hold on wavetable position
• delayed sub-octave swell
• noise layer into the pad

Result

The pad seems to inhale, shift tone, and occasionally reveal ghost overtones.

C. Dark evolving drone with reset phrasing

Patch

• Clock Side A and Side B from the same slow clock
• Put one side in /2N, the other in /2N+1
• Patch outputs to:
• two different envelope generators
• one switch selecting filter modes
• one strike to a resonator mixed beneath the pad
• one trigger to reverse or clock a delay/reverb modulation source if available

Then periodically Reset both sides manually or from a sequencer phrase reset.

Why reset matters

Without reset, the interaction slowly drifts into long evolving forms. With periodic reset, the atmosphere gets a recurring “haunting motif.”

Best mode choices by goal

For distorted percussion

• N: best for linear, stepped, rotating drum lines
• /2N+1: best for asymmetrical industrial rhythms
• Wack /2N+1: best for explosive glitch percussion and metallic chaos

For basslines

• N: strong for phrase-locked modulation events
• /2N: good for halftime and predictable wobble scaffolding
• Wack N: great for inserting random motion while keeping one event per step
• Wack /2N: good for unstable accents and ghost modulation

For pads

• /2N at slow clocks: best for broad structural breathing
• N: useful for orderly long-form rotation
• Wack N: subtle haunted unpredictability

Shift/Offset performance techniques

The Shift control is one of the most musically important features.

Because it rotates the outputs, you can repurpose the same patch into many patterns without moving cables.

Great uses of Shift

• Rotate which drum gets the downbeat
• Move accents around a bass phrase
• Change which modulation occurs first in a cycle
• Reframe a pad’s sequence of tonal changes

Performance idea

Patch 4–8 outputs into a network of: - triggers to drums - modulation retriggers - switch advances - random sample clocks

Then perform with only: - mode switch - Shift - Reset

This gives dramatic variation with low patch complexity.

Wack mode: where the weirdness lives

Wack mode is especially useful for the genres you mentioned.

Wack /2N

• Great for humanized or unstable accents
• Excellent for broken hats, ghost snares, crackle percussion
• Good for bass timbre changes that shouldn’t happen every cycle

Wack N

• One random trigger each step
• Great for selecting one of many timbral events
• Very useful for “one thing changes each beat” bass animation
• Excellent for haunted pad articulation

Wack /2N+1

• Wildest setting
• Dense trigger clouds
• Perfect for glitch percussion, FM burst clusters, reverb splashes, and chaotic control events
• Use with attenuated modulation or logic if it becomes too busy

Advanced patch ideas

1. Distortion scene switching

Use Integra Solum to trigger a sequential switch that changes: - clean path - overdrive path - wavefold path - bitcrush path

Same sound source, different processing per trigger = massive rhythmic timbral variation.

2. Triggered FM spikes

Take one output to a very short decay envelope controlling FM amount on an oscillator.
This is amazing for: - punchy kicks - tearing bass growls - ghostly pad overtones

3. Parallel percussion architecture

Use different outputs to hit: - body layer - click layer - noise layer - resonator layer

Then mix them. As Shift rotates, the composite drum identity changes.

4. Bass articulation by selective muting

Instead of only triggering the bass on/off, use some Integra Solum outputs to trigger a second envelope that briefly ducks the bass with a VCA.
This creates internal syncopation and stutter-groove.

5. Reverb and delay as instruments

Trigger short envelopes that open VCAs feeding effect sends: - percussion trigger opens reverb send only on selected hits - bass trigger opens delay send only on phrase endings - pad trigger splashes shimmer reverb randomly

This gives a very cinematic, haunted space.

Practical patch recipes

Recipe 1: Neuro snare engine

• Side A N: trigger snare body
• Another Side A out: trigger noise burst
• Side B Wack /2N: trigger distortion boost
• Another Side B out: trigger bandpass envelope
• Rotate Shift until groove locks

Result: unstable tearing snare with changing transient aggression.

Recipe 2: Dubstep bass growl

• Side A /2N: trigger amp envelope
• Side B N: trigger sample-and-hold for filter cutoff
• Another Side B out: trigger FM spike envelope
• Another Side B out: trigger delay-send accent
• Reset every 1 or 2 bars

Result: consistent groove with mutating growl character.

Recipe 3: Rolling DnB reese

• Fast clock
• Side A /2N+1: trigger VCA chopper
• Side B Wack N: one random modulation event per step
• Modulation events:
• notch sweep
• distortion gain jump
• phaser feedback rise
• transient pitch jab

Result: rolling, complex, forward-moving bass texture.

Recipe 4: Haunted pad

• Slow clock
• Side A /2N: long envelope retriggers
• Side B Wack N: random shimmer, filter swell, or pitch-drift resample
• Heavy reverb and stereo modulation
• Occasional manual Reset

Result: drifting, ghostly, semi-repeating ambient texture.

Things to watch out for

• Integra Solum outputs are triggers, not continuous CV shapes.
• For richer modulation, send triggers to:
  • envelopes
  • function generators
  • sample-and-holds
  • switches
  • logic
• If a patch gets too chaotic, reduce complexity by:
• using only 2–4 outputs per side
• slowing the clock
• using reset every bar or phrase
• moving randomization to timbre, not note timing
• If your target module needs hotter gates, check whether 5 V triggers are sufficient. Usually they are in Eurorack.

Best companion modules for Integra Solum

It pairs especially well with: - envelope/function generators - VCAs - distortion/wavefolders - sample & hold - sequential switches - logic modules - clock multipliers/dividers - filters with CV over resonance/cutoff - burst generators - effects with CV-able send or parameters

If you want, I can also give you:

1. a 10-patch performance cheat sheet for Integra Solum,
2. a genre-specific patch list for dubstep vs DnB vs dark ambient, or
3. a “what to patch each of the 16 outputs to” template.

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