# Noise Engineering — Integra Solum - [Manual PDF](../../manuals/Integra Solum Manual - Noise Engineering Documentation.pdf) --- [Manual / Docs](https://manuals.noiseengineering.us/is/) # Noise Engineering Integra Solum for dense, hyper-complex percussion Integra Solum is not a sound source or effect; it’s a **dual rotating clock divider / trigger generator**. That makes it extremely good for building **intricate drum logic**, especially when you want: - **polyrhythms** - **offset repeating structures** - **odd-length cycles** - **rotating accents** - **controlled randomness** - **two interlocked but independent rhythmic systems** Because it has **two sides of 8 trigger outputs**, independently clockable/resettable, you can treat it like **two related rhythmic brains** in one module. ## What it does best for percussion From the manual, the key features for rhythm design are: - **Dual sections**, each with **8 trigger outputs** - Shared or separate **clock** and **reset** - **Shift** control rotates the order of outputs - Three core modes: - **/2N** = powers-of-two divisions - **N** = sequence of eight - **/2N+1** = odd-number divisions - **Wack mode** adds randomized behavior - One clock can **normal to both sides**, or you can clock each side independently That means Integra Solum is ideal as a **master trigger architecture module** for percussion systems built from drum voices, LPGs, envelopes, burst generators, logic, and VCAs. --- # Big-picture strategy For hyper-complex percussion, think of Integra Solum as generating **layers of rhythmic hierarchy**: 1. **Main pulse layer** foundational kick/snare timing 2. **Subdivision layer** hats, shakers, clicks, ghost hits 3. **Accent rotation layer** changing emphasis over time via Shift 4. **Odd-cycle layer** polymeter and phrase drift via /2N+1 5. **Random disruption layer** Wack mode for instability and variation Use one side for **stable structure**, and the other for **destabilization**. A strong approach is: - **Side A** = your “grid authority” - **Side B** = your “mutation engine” --- # Understanding the three modes musically ## 1. /2N mode: powers-of-two divisions This is your classic clock division territory. Use it for: - kicks on slower divisions - snares/claps on medium divisions - regular hats from faster divisions - structured anchors in otherwise chaotic patches This mode is useful when you want **clarity inside complexity**. Even if everything else gets strange, /2N gives the ear recognizable points of reference. ### Good uses - Kick on one slow output - Snare on a medium division - Closed hat on a faster division - Accent trigger for opening a VCA or changing decay on another drum voice ### Why it helps with dense rhythm Dense music only works if some layer remains comprehensible. /2N provides that backbone. --- ## 2. N mode: sequence of eight This is one of the most useful modes for evolving percussion. The manual describes it as a **sequence of eight**, and the Shift control rotates which jack is considered the first in the cycle. Think of it like an **8-step trigger scan** spread across the outputs. Use it for: - stepping through 8 percussion voices - moving accents around a smaller set of voices - creating phrase-based rhythmic movement - manually “rotating” patterns without re-patching ### Great patch idea Patch several outputs from one side in N mode to: - kick trigger - snare trigger - closed hat - open hat - rim - clap - FM percussion hit - noise burst Now Shift changes which output happens first, so the whole drum phrase rotates. This is a very fast way to get **pattern mutation** while keeping a coherent phrase shape. ### Why it helps with complex time signatures Because the sequence is ordered and rotatable, you can align or misalign it against another clock domain or reset interval to create: - 5-over-8 feeling - 7-against-4 phrase movement - evolving downbeat displacement --- ## 3. /2N+1 mode: odd-number divisions This is the goldmine for **polyrhythms and weird meters**. Odd divisions naturally resist lining up with standard 4/4 subdivisions. That gives you: - 3-based accents over 4-based kicks - 5-step recurring percussion lines - 7-hit phrase overlays - long non-repeating composite structures ### Best uses - toms - metallic percussion - accents - ratchet enable signals - modulation triggers for drum parameter changes ### Why this mode matters If you want “complicated patterns” that don’t feel like simple x0x repeats, odd-number divisions are essential. A patch with: - Side A in **/2N** - Side B in **/2N+1** already gets you far into **polymetric percussion architecture**. --- # Wack mode: where complexity becomes alive Wack mode turns Integra Solum from a structured divider into a **controlled chaos percussion sequencer**. The manual gives these behaviors: ## Wack /2N - probabilistic divide-by-two behavior - 50% chance of generating a trigger at each step - average density similar to /2N, but randomized This is ideal for: - ghost hats - unstable accents - broken techno percussion - swung-feeling textures without actual swing ## Wack N - a **single random trigger** is generated at each step This is excellent for: - rotating one-hit-per-step percussion choice - “which voice fires now?” behavior - sparse but animated phrase motion If patched to multiple drum voices, this becomes a kind of **random voice allocator**. ## Wack /2N+1 - all 8 outputs independently have a 50% chance of going high on each rising clock This is the densest and wildest mode. It can generate: - flurries of percussion - clustered impacts - glitch bursts - chaotic fills This is perfect for: - hats through VCAs - noise bursts - FM clicks - transient layers - fill sections - modulating drum parameters at high density --- # Best practical patch architectures ## Patch 1: Stable core + unstable detail A classic high-functioning drum patch. ### Side A - Clocked by your master clock - Mode: **/2N** - Use outputs for: - kick - snare - clap - open hat accents ### Side B - Same clock, normalled from Side A - Mode: **/2N+1** or Wack **/2N+1** - Use outputs for: - closed hats - shakers - blips - metallic percussion - fills ### Result Side A gives groove stability; Side B generates tension and complexity. --- ## Patch 2: Two independent clock domains for true polyrhythm Since each side can be clocked independently, use this. ### Side A - Clock: straight 16th-note clock - Mode: **N** - Handles your “main kit” ### Side B - Clock: a different clock rate, such as: - triplets - dotted 8ths - clock multiplied x5 or x7 - a manually divided odd-rate pulse - Mode: **/2N+1** ### Result The two sides phase against each other and create **real polyrhythm**, not just rotated variation. This is one of the strongest uses of the module. --- ## Patch 3: Complex time signatures with strategic reset The reset input is crucial. Use resets to define phrase length. For example: - Let Side A reset every **16 steps** - Let Side B reset every **15** or **14** or **21** steps Now your rhythmic pattern re-aligns only after a longer cycle. That gives the effect of: - shifting meters - non-repeating bar structures - evolving phrase accents ### Example feel - Side A suggests 4/4 - Side B implies 5/4 or 7/8 - Together, the system creates long-form rhythmic evolution Because the reset can be patched independently, you can use another sequencer, logic source, or clock divider to determine phrase boundaries. --- ## Patch 4: Rotating drum orchestration Put one side in **N** mode and patch each output to a different percussion voice. Then perform with **Shift**. Since Shift rotates the outputs, the order of events moves across the kit: - kick appears in different phrase positions - snares displace - metallic hits slide forward - accents migrate This is excellent for: - live improvisation - pattern mutation without menu diving - generating “same pattern, new groove” effects If your voices have overlapping timbres, this can sound like a highly composed rhythmic rearrangement rather than randomization. --- ## Patch 5: Trigger one voice, modulate another Don’t use all outputs only as drum triggers. Some should control **parameters**. Patch outputs to: - envelope triggers for pitch sweeps - accent VCAs - decay CV sample-and-hold clocks - filter ping triggers - wavefolder CV gates - sample-rate or bit-depth change triggers - switch/select modules to swap percussion timbres ### Example - One output triggers a kick - Another output, on a different division, triggers a short envelope that momentarily increases kick pitch or attack - Another output opens a VCA on noise layered with the snare Now the rhythm system is not just deciding **when** things happen, but also **what kind** of hit happens. That’s how you get truly intricate percussion. --- # How to make it feel dense without becoming mush Dense rhythmic music needs separation. Use Integra Solum to distribute roles. ## Assign outputs by function Instead of patching 8 outputs to 8 random drums, organize them like: - 2 outputs = structural hits - 2 outputs = accents - 2 outputs = ghost notes - 2 outputs = parameter modulation triggers This keeps complexity legible. ## Use different decay lengths Even if two triggers are dense, they’ll read clearly if one voice is: - short click - medium snare - long metallic ring ## Reserve Wack mode for upper layers If everything is randomized, the groove dissolves. Usually: - stable low-end - unstable mids/highs works best. ## Use reset as composition A reset is not just utility; it is a phrase-defining tool. Resetting one side at unusual lengths creates “meter” out of pure trigger logic. --- # Specific advanced rhythmic ideas ## 1. Fake euclidean-like behavior While Integra Solum is not a Euclidean sequencer, you can approximate distributed rhythmic variety by: - using **N** mode for ordered stepping - rotating with **Shift** - resetting at odd lengths - combining one side in **/2N+1** The result is often similar to Euclidean percussion: evenly distributed but shifting accents. ## 2. Cross-accenting Use one side to trigger hats regularly, and the other side to trigger accent envelopes that modulate: - hat decay - hat VCA level - hat filter cutoff This creates a second rhythm over the first, giving a very “programmed” complex drum-machine feel. ## 3. Fill generator Leave one side in stable mode, and switch the other into a Wack mode during fills. For example: - normal groove: Side B in /2N+1 - fill: Side B in Wack /2N+1 This creates dramatic bursts of activity without losing the foundational pulse. ## 4. Long-form cycle design Try this: - Side A reset every 16 clocks - Side B reset every 12 clocks - Side A in N - Side B in /2N+1 You’ll get recurring but slowly recombining patterns. This is great for: - IDM - broken beat - industrial - complex techno - generative percussion ## 5. Voice stealing by trigger overlap Patch multiple outputs into a logic OR/mixer or trigger combiner before hitting a single voice. This can generate: - irregular retriggers - burst-like rolls - clustered impacts Especially effective with: - noise snares - resonant pings - LPG bongos - FM blips --- # Performance techniques ## Use Shift as a live composition control Shift is one of the most musical controls on the module. During performance: - move Shift slowly for phrase evolution - snap it abruptly for fills and drops - rotate only one side while the other remains fixed This creates the sensation of changing the beat “from the inside.” ## Toggle Wack mode for variation The Wack modes are powerful live tools. Use them like: - enter Wack for a breakdown - return to normal mode to re-lock the groove - place only one side in Wack for asymmetrical disruption ## Separate the clocks live If both sides normally share one clock, temporarily clock one side differently for: - burst sections - halftime/doubletime overlays - triplet percussion episodes --- # Concrete genre-oriented uses ## For IDM / glitch - Side A: N mode for phrase structure - Side B: Wack /2N+1 for fragmented hats and clicks - Route some outputs to sample-select, decay modulation, and pitch envelopes ## For polyrhythmic techno - Side A: /2N for kick/snare architecture - Side B: /2N+1 for toms, rides, metallics - Reset Side B on a different phrase boundary than Side A ## For industrial / broken rhythm - Side A: stable pulse - Side B: Wack N or Wack /2N+1 into noisy percussive voices - Use Shift aggressively ## For “complex but danceable” - Keep kick and main snare on the more predictable side - Put all hats, claps, ghosts, percussion, and parameter accents on the experimental side --- # Good companion modules Integra Solum becomes especially powerful with: - **drum voices** or percussive synth voices - **logic modules** for combining/diverting triggers - **switches** for re-routing outputs - **burst generators** - **sample and hold** - **VCAs** - **envelope generators** - **clock multipliers/dividers** - **sequential switches** - **accent VCAs** - **mute/performance mixers** If you have a logic module, combining Integra Solum outputs with AND/OR/XOR can push it into very advanced rhythmic territory. --- # Technical notes from the manual that matter - Clock responds to a **rising edge around 3.3 V** - Outputs update with about **70 µs latency** - Trigger outputs go **0 V to 5 V** - Trigger threshold is around **3.4 V** - One clock input can **normal to both sides** - Reset can be used independently per side or commonly In practical terms, that means it should play nicely with most Eurorack trigger/gate destinations. --- # Best starting patch for your goal If your goal is **densely rhythmic, hyper-complex percussion**, start here: ## Recommended starter setup ### Side A - Master clock in - Mode: **/2N** - Outputs to: - kick - snare - clap - accent envelope ### Side B - Same clock, normalled - Mode: **/2N+1** - Outputs to: - closed hat - open hat - shaker - rim - metallic percussion - noise burst - decay modulation trigger - pitch envelope trigger ### Then - Rotate **Shift** on Side B - Reset Side B at an odd phrase length - Occasionally enter **Wack mode** on Side B This gives you: - a dependable body - unstable upper percussion - phrase movement - odd-cycle behavior - enough complexity to stay interesting for a long time --- # Bottom line Integra Solum excels at **architecting percussion ecosystems**, not just simple clock division. For hyper-complex rhythmic music, its strengths are: - **two parallel rhythmic layers** - **odd divisions** - **rotating output order** - **independent resets** - **probabilistic Wack behaviors** - **easy creation of long, non-repeating composite cycles** If you want dense percussion, use it less like a “divider” and more like a **dual phrase engine**: - one side defines pulse, - the other side destabilizes it, - resets define meter, - Shift defines motion, - Wack defines chaos. [Generated With Eurorack Processor](https://github.com/nstarke/eurorack-processor)