# Rebel Technology — Stoicheia - [Manual PDF](../../manuals/Stoicheia – Rebel Technology.pdf) --- [Manual PDF / Source](https://www.rebeltech.org/product/stoicheia/) # Rebel Technology Stoicheia: using it for melodic components Stoicheia is **not a pitch sequencer**. It’s a **dual Euclidean trigger/gate sequencer**. So its role in melody-making is to create the **rhythmic structure** that drives melodic events: when notes happen, how often they happen, how two lines interlock, and how phrase lengths evolve. ## What the module does From the manual: - **Dual Euclidean sequencer** - Two independent sequences - Each side has: - **Length**: 1–16 steps - **Fills**: how many active beats - **Rotation**: shifts the pattern start point - **Mode switch**: - Off - **Trigger mode** - **Alternating mode** - Shared functions: - **Reset input** - **Manual reset** - **Chained mode** to play seq A then seq B as one longer pattern Outputs are gates around **0V / 5.1V**, so they’re ideal for triggering envelopes, clocks, sample & holds, logic, switches, and many quantizer/sample functions. --- # How Stoicheia contributes to melody To make melody in Eurorack, you usually need these building blocks: 1. **Pitch source** quantizer, sequencer, random voltage, joystick, keyboard, S&H, etc. 2. **Rhythm / note timing** this is where **Stoicheia** shines 3. **Articulation** envelopes, VCAs, accents, legato/tied gates 4. **Phrase structure** resets, polymeter, pattern chaining, variation Stoicheia mainly handles **2, 3, and 4**. --- # Best melodic uses ## 1. Triggering notes from a pitch source Patch idea: - Clock/LFO → Stoicheia clock input - Stoicheia output A → envelope gate input - Envelope → VCA CV - Oscillator → VCA → filter/output - Separate CV sequencer or quantized random voltage → oscillator 1V/oct Result: - Pitch source determines **what note** - Stoicheia determines **when the note speaks** This is the most direct melodic use. Even a simple 8-note pitch loop becomes musical when Euclidean spacing changes the note onsets. ### Why it works Euclidean rhythms distribute pulses evenly, so note timing often feels balanced and musical: - sparse fills = airy melodic fragments - dense fills = active arpeggio-like lines - rotation = syncopation without rewriting pitches --- ## 2. Using the two channels for melody + accent Since Stoicheia has two sequences, one can drive notes and the other can shape emphasis. Patch idea: - Seq A output → main envelope trigger - Seq B output → accent envelope or filter envelope trigger - Pitch sequencer → oscillator pitch - Seq B also to a second VCA/CV input for louder accented notes Result: - A note line plays on Seq A - Seq B adds accents on selected steps - The same pitch pattern feels far more melodic because phrasing emerges Good settings: - A = E(5,8) type density - B = E(3,8) or E(2,5)-like accent rhythm - Rotate B relative to A for evolving accents --- ## 3. Triggering sample-and-hold for stepped melodies One of the strongest pairings: - Noise / random CV / smooth CV / LFO → Sample & Hold input - Stoicheia output A → S&H trigger - S&H output → quantizer → oscillator pitch - Same Stoicheia output or another gate → envelope Result: - Stoicheia creates the rhythm of pitch changes - Quantizer turns random voltages into scales - You get Euclidean melodies instantly ### Variations - Use **Seq A** to sample new pitches - Use **Seq B** to trigger the envelope This creates: - some pitches change without sounding immediately - some notes repeat the same pitch before a new one is sampled That’s a classic trick for more intentional-sounding melodic lines. --- ## 4. Creating call-and-response melodies Because Stoicheia is dual, you can patch two voices: - Seq A → envelope/VCA for voice 1 - Seq B → envelope/VCA for voice 2 - Different pitch sources or related quantized voltages to each oscillator Result: - two interlocking melodic lines - one can answer the other - differing lengths/fills create evolving counterpoint Example: - Voice 1: length 8, fills 3 - Voice 2: length 5, fills 2 - Same master clock to both This yields polymetric melodic interplay that cycles over a long phrase. --- ## 5. Driving a sequential switch for melodic order changes Patch idea: - Several fixed voltages, row outputs, or interval sources → sequential switch inputs - Stoicheia output A → switch advance - Switch output → quantizer → oscillator pitch - Stoicheia output B → envelope gate Result: - Seq A determines when the next pitch source is selected - Seq B determines when notes are articulated This separates: - **pitch movement** - **note articulation** That separation is extremely useful for building melodies that feel composed rather than merely random. --- ## 6. Alternating mode as melodic gate/tie generator The manual says **Alternating Mode** toggles output high on each “on” beat and stays high until the next “on” beat. Musically, this is excellent for: - **tied notes** - **legato phrasing** - **phrase masks** - **sub-octave or harmonic switching** - **opening/closing a VCA or wavefolder over longer spans** Patch idea: - Seq A in Trigger mode → main note triggers - Seq B in Alternating mode → controls: - VCA level for drone layer - filter mode switch via logic/comparator - slew enable / glide gate - sequential switch between two pitch rows Result: - the melody has sections of connected phrasing or changing harmonic color A very useful melodic application: - Trigger mode handles note attacks - Alternating mode defines **longer melodic gestures** --- ## 7. Chained mode for longer melodic phrases In **Chained mode**, sequence A plays, then sequence B plays, one after another, available at both outputs. This is powerful for melody because it creates phrase lengths beyond a single short loop. Example: - Seq A length 12 fills 5 - Seq B length 4 fills 2 Now you have a 16-step composite rhythm with uneven internal structure. Use this to: - trigger a quantized CV source - advance a pitch sequencer at non-uniform points - make verse-like / response-like melodic phrasing Especially effective if the pitch material is also 16 steps or longer. --- ## 8. Rotating patterns to reshape a melody without changing pitch The **rotation** control changes where the Euclidean pattern begins. If your pitch sequence stays fixed and only rhythm rotates: - the melody becomes newly syncopated - downbeats shift - the same notes feel reharmonized against the bar This is one of the easiest live-performance tools on Stoicheia. Try: - fixed 8-step pitch sequence - Seq A length 8 fills 5 - move rotation slowly The pitch order remains unchanged, but perceived melodic contour changes because note emphasis moves. --- ## 9. Different sequence lengths for melodic polymeter Each channel can have independent lengths. This is gold for melody. Example: - Seq A: length 7, fills 3 - Seq B: length 11, fills 4 Use cases: - A triggers pitch changes - B triggers envelopes - or A/B trigger two related voices This creates long non-repeating melodic structures from simple material. A favorite patch: - A → S&H trigger for new note selection - B → envelope trigger for audible note events Because pitch-update rhythm and note-output rhythm differ, the line develops a semi-generative melodic identity. --- # Practical patch recipes ## Patch 1: Euclidean arpeggio **Goal:** rhythmic melodic ostinato - Master clock → Stoicheia clock A - Stoicheia output A → envelope trigger - Quantized CV sequence/arpeggiator → oscillator 1V/oct - Envelope → VCA - Oscillator → VCA → mixer Suggested settings: - Length 8 - Fills 5 - Rotate to taste - Trigger mode This gives a classic syncopated arp line. --- ## Patch 2: Generative melody with controlled repetition **Goal:** melodic randomness with coherent rhythm - Slow random CV → S&H input - Stoicheia output A → S&H trigger - S&H out → quantizer → oscillator 1V/oct - Stoicheia output B → envelope trigger - Envelope → VCA Suggested settings: - A: length 5, fills 2 - B: length 8, fills 5 Why it works: - pitch changes and audible notes happen on different schedules - repeated notes emerge naturally - melody feels intentional instead of purely random --- ## Patch 3: Two-voice counterpoint **Goal:** interlocking melodic lines - Same clock to Stoicheia - Seq A → envelope 1 - Seq B → envelope 2 - Pitch source 1 → osc 1 - Pitch source 2 → osc 2 - Both voices mixed together Suggested relationships: - Voice 1 brighter / higher register - Voice 2 lower / slower attack - Rotate B off from A Good settings: - A = 8 steps / 3 fills - B = 5 steps / 2 fills You get compact polymelodic interplay. --- ## Patch 4: Accent + melody line **Goal:** one melodic voice with dynamic phrasing - Seq A → main envelope gate - Seq B → filter envelope trigger or accent VCA CV - Pitch sequencer → oscillator - Main envelope → VCA - Accent envelope → filter cutoff or VCA CV depth Settings: - A denser than B - B rotated to avoid obvious downbeat accents This makes a simple melody breathe. --- ## Patch 5: Euclidean note selection **Goal:** switch between pitch sources rhythmically - Fixed voltages / sequencer rows / intervals → sequential switch inputs - Seq A → switch advance - Switch output → quantizer → oscillator pitch - Seq B → envelope trigger This creates melodies from source selection rather than from one continuous pitch sequencer. --- # Performance strategies ## Use one channel for structure, one for surprise A very musical setup is: - **Seq A:** stable, medium density, main notes - **Seq B:** sparse, rotated, for accents / secondary voice / pitch refresh That gives you both familiarity and movement. ## Change fills before changing length For live melodic evolution: 1. keep length fixed 2. vary fills 3. then rotate 4. then change length This tends to preserve groove while evolving the melody. ## Use reset musically The reset input/manual reset is useful when: - syncing phrase starts to a bar - re-aligning two melodic voices - forcing a generative patch to “come home” ## Chained mode for section changes Use chained mode to move from: - phrase A - into phrase B - then repeat Great for melodic hooks that need asymmetry. --- # Limits to understand Stoicheia does **not** generate pitch CV on its own. To build full melodic content, pair it with at least one of these: - quantizer - CV sequencer - random voltage source - sample & hold - keyboard/controller - precision adder - sequential switch Think of Stoicheia as the **rhythmic brain** of a melody patch. --- # Most effective module pairings for melodic work Stoicheia works especially well with: - **Quantizer** turns triggered/random voltages into scale-based melodies - **Sample & Hold** generates stepped pitch events at Euclidean timings - **Sequential switch** creates melodic routing and note-order variation - **Envelope + VCA** articulates each note - **Precision adder / offset source** transposes repeating patterns - **Clock divider / multiplier** creates different melodic timescales - **Logic modules** combine Seq A and B into more complex note masks --- # Summary Stoicheia is best used for melody by controlling: - **when notes happen** - **when pitch changes** - **when accents happen** - **how two melodic layers interlock** - **how a phrase resets or extends** Its strongest melodic applications are: 1. triggering envelopes for a pitched voice 2. clocking sample-and-hold into a quantizer 3. separating pitch-change rhythm from note-trigger rhythm 4. generating accent patterns 5. creating two-voice interlocking melodic lines 6. using alternating mode for tied/legato phrase behavior 7. using chained mode for longer melodic forms In practice, Stoicheia turns plain pitch material into **musical phrasing**. If you already have any CV source that can produce notes, Stoicheia can make it feel alive. [Generated With Eurorack Processor](https://github.com/nstarke/eurorack-processor)