# Hexinverter — Orbitals - [Manual PDF](../../manuals/hexinverter-orbitals.pdf) --- [Manual PDF](#) # Hexinverter Orbitals — using it for melodic components Orbitals is a **dual bipolar voltage-controlled step sequencer** that can work as: - **2 independent 8-step sequencers** - **1 combined 16-step sequencer** For melody-making, that makes it especially useful as: - a pitch sequencer - a rhythm/gate pattern source - a transposable melodic line generator - a voltage-addressed note selector - a two-lane melody/countermelody tool ## What Orbitals contributes musically From the manual, the key melody-oriented features are: - **Per-step CV knobs** for programming note values - **Per-step gate switches** for deciding which notes articulate - **Bipolar or unipolar CV output** - **Transpose input on Sequencer A** - **Sequence length control** - **Multiple playback modes**: - Forward - Reverse - Pendulum - Random - CV addressed - Clocked CV addressed - **Internal or external clocking** - **Reset, run, reverse, and slave/sync options** - **Selectable output ranges via rear jumpers** This is enough to build classic melodic sequencing, but also more experimental note selection and phrase variation. --- ## Core melodic use cases ## 1. Classic pitch sequencer The most obvious use is to send: - **CV OUT** → oscillator **1V/oct** - **GATE OUT** → envelope gate input Then tune each step knob by ear to a scale or motif. ### Why it works well - The gate switches let you create rests. - Length control can turn an 8-step line into 3, 5, 7, etc. steps for evolving loops. - Bipolar mode lets you center pitches around 0V if your downstream patch likes positive and negative modulation. ### Musical results - basslines - lead sequences - repeating ostinati - Berlin-school/Tangerine Dream-style patterns The manual explicitly mentions the transpose input for keyboard-based transposition in this style. --- ## 2. 16-step melodic phrase builder If **Sequencer A length is set over 8**, Orbitals automatically enters **16-step mode**. In this mode, the module becomes a longer melodic sequencer for: - full-bar phrases - call-and-response within one row - verse-like repeated pitch structures - longer melodic arcs than typical 8-step loops ### Practical approach - Program steps 1–8 as motif A - Program steps 9–16 as motif B or a variation - Use gate switches to create rhythmic contour - Clock externally from your master clock for tight timing This is great when 8 steps feel too short and repetitive. --- ## 3. Dual melody + countermelody patch In **dual 8-step mode**, A and B can run independently. This allows: - **A** = bassline - **B** = lead line or - **A** = melodic pitch CV - **B** = second voice / harmony / counterline Because each sequencer has: - its own rate - its own mode - its own clock/reset/run inputs - its own gate length - its own sequence length you can create **polymetric melodic relationships** very easily. ### Example - A length = 5 - B length = 7 - same clock source - both quantized downstream Result: a constantly shifting melodic relationship that takes a long time to repeat. --- ## 4. Transposable melodic sequencing One of Orbitals’ best musical features is: - **TRANS A input** This input adds an external voltage to Sequencer A’s CV output. ### Melodic uses - Play a keyboard into TRANS A to transpose a sequence live - Use another sequencer, offset generator, or precision adder source to shift the melody by intervals - Send a slow CV to transpose the whole line over time ### Musical applications - verse/chorus key changes - root-note movement under a repeating melodic pattern - live performance transposition - classic modular “play the sequencer from a keyboard” patches This is one of the most direct ways Orbitals creates richer melodic content instead of a static loop. --- ## 5. Voltage-addressed note selection Orbitals has two special modes for step selection: - **CV mode** - **CLK mode** In these modes, the **RST/CV input** becomes a **0–5V step address input**. That means instead of advancing step-by-step, an incoming voltage chooses the current step. ### CV mode - Incoming CV directly selects the step - A new gate is generated whenever the step changes ### CLK mode - CV selects the step - A new gate only happens on clock events ### Why this matters melodically This turns Orbitals into something more like: - a note lookup table - a manually programmable quantized melody bank - a non-linear pitch source ### Patch ideas - Use an LFO, random voltage, joystick, or another sequencer to address steps - Program each step as a note from a scale - Let incoming CV “scan” the melody map This creates: - non-linear melodies - repeatable but less predictable pitch order - generative melodic structures CLK mode is especially useful when you want rhythmic stability but non-linear note choice. --- ## 6. Random melodic generator In **RND mode**, every clock selects a random step. If the step knobs are tuned to notes of a scale, this becomes a playable random melody source. ### Best practice For more musical randomness: - tune all active steps to a limited note set - disable some gates for rests - use shorter sequence lengths to constrain choices - transpose the result with TRANS A ### Result You get melodies that feel: - unpredictable - bounded - stylistically coherent This is very effective for ambient, generative, and IDM-style patches. --- ## 7. Pendulum and reverse for phrase variation Orbitals includes: - **FW** - **REV** - **PND** These are simple, but extremely musical. ### Reverse Great for: - inversion-like phrase behavior - turning a lead into a response phrase - variation without repatching ### Pendulum Great for: - symmetrical melodies - arpeggio-like up/down movement - longer-feeling loops from fewer steps A short 4-step programmed phrase in pendulum mode can sound much more animated than plain forward playback. --- ## 8. Sequence length as a melodic tool The **LENGTH** knobs do more than shorten loops — they reshape melody. ### Useful musical tricks - Set a sequence to 3, 5, or 7 steps for looping against 4/4 rhythm - Use A at 8 and B at 5 for evolving harmony - Make a short motif repeat unevenly before resolving This is one of the easiest ways to get melodies that feel alive without needing additional modules. --- ## 9. Gate pattern as melodic phrasing Because each step has a **gate switch**, Orbitals separates: - pitch progression - note articulation This is very important musically. Even if pitch steps continue internally, only selected steps create notes. ### Melodic phrasing possibilities - create rests - create syncopation - emphasize certain notes - thin out dense pitch patterns Combined with gate length control, this can move a sequence from: - plucky staccato to - sustained legato-like lines The manual notes that at fast speeds, longer gate settings can tie gates together, which can be musically useful for smoother phrasing. --- ## 10. Using Sequencer B as melodic support for A Even if you only need one main melody, Sequencer B is still very useful. ### Good companion roles for B - second melodic voice - transposition source for other modules - modulation for filter or wavefolder tied to the melody - rhythmic gate pattern for another voice - alternate phrase layer With the **SLAVE B>A** switch, B can share A’s transport control inputs, making it easy to keep them synchronized without extra patching. This is ideal when building: - harmonized lines - bass + lead relationships - melody + ornament pairs --- ## Practical patch recipes ## Patch 1: Simple melodic line - Orbitals A **CV OUT** → VCO 1V/oct - Orbitals A **GATE OUT** → envelope gate - Envelope → VCA CV - VCO → VCA → mixer - Set A to **FW** - Tune the 8 knobs to a scale - Turn some gate switches off for rests Result: a straightforward sequenced melody. --- ## Patch 2: Tangerine Dream style live-transposed sequence - Patch as above - Keyboard CV or precision voltage source → **TRANS A** - Use external clock for tempo sync - Use 8 or 16 steps - Keep the programmed pattern intervallic rather than absolute Result: the same sequenced pattern can be moved harmonically in performance. --- ## Patch 3: Bassline + lead - A CV/GATE → bass voice - B CV/GATE → lead voice - Same external clock to both, or use **SLAVE B>A** - A length = 8, B length = 5 or 7 - A in FW, B in PND or RND Result: interlocking melodic layers with different repetition cycles. --- ## Patch 4: Addressed melody map - Program each step to notes in a scale - Set mode to **CV** or **CLK** - External modulation source → **RST/CV input** - CV OUT → oscillator pitch - GATE OUT → envelope Result: incoming voltage selects notes from your programmed set instead of stepping linearly. This is excellent for controlled generative melody. --- ## Patch 5: Random but musical notes - Set A to **RND** - Tune active steps to chord tones or scale tones - Shorten sequence length to 4–6 steps - Use gate switches to create sparse rhythms - Add transpose on TRANS A Result: constrained random melodic movement. --- ## Patch 6: Long-form 16-step phrase - Set Sequencer A length above 8 to enter **16-step mode** - Program first half as phrase - Program second half as variation - Clock externally - Use reset to realign with your song structure Result: a longer, more song-like melodic sequence. --- ## Important technical/musical considerations ## Output range matters Orbitals has rear jumpers for output range selection. From the manual: - **Bipolar ON, 5V jumper**: -2.5V to +2.5V - **Bipolar ON, 10V jumper**: -5V to +5V - **Bipolar OFF, 5V jumper**: 0V to +5V - **Bipolar OFF, 10V jumper**: 0V to +10V ### For melodic use If you’re driving oscillator pitch directly: - the larger ranges can span many octaves - this makes precise tuning harder by ear So musically, a smaller range is often easier for tonal sequencing unless you want wide interval leaps. ## Safety note The manual is explicit: **Never adjust the jumpers with the module powered on.** --- ## Clocking considerations for melody Orbitals can use: - its own internal clock - an external clock For music systems with drums, master clocks, or song structure, external clocking is usually the better choice. The module expects about: - **1V logic high** for clock/reset/run inputs It can also run quite fast — up to low audio range internally and about **1kHz clock input** reliably — which means it can blur into audio-rate or pseudo-oscillator behavior, though for melody the sweet spot is obviously much slower. --- ## Best musical strengths of Orbitals Orbitals is particularly strong when you want: - **hands-on pitch programming** - **classic analog sequencing** - **easy melodic transposition** - **two related melodic lanes** - **non-linear voltage-addressed note selection** - **simple but powerful performance variation** It is especially good for: - Berlin-school sequences - basslines - looping motifs - generative melodic patches - interlocking two-voice patterns --- ## Limitations to keep in mind Based on the manual, a few practical melodic limitations: - No built-in quantizer is mentioned, so tuning notes to exact scales may need care or an external quantizer. - Output range can be broad, which may make fine pitch dialing sensitive. - Voltage-addressed modes are powerful, but they are not the same as a dedicated quantized note memory system. Still, the combination of **manual step programming + transpose + addressable steps + dual lanes** makes it very musically flexible. --- ## Bottom line Hexinverter Orbitals is a very capable melodic sequencer for eurorack because it can cover both: - **traditional note sequencing** and - **more experimental CV-addressed melody generation** Its standout melodic features are: - dual 8-step / single 16-step operation - per-step pitch and gate programming - transpose input - random/reverse/pendulum modes - CV-addressed step selection - easy synchronization between the two sequencers In a patch, it can act as: - the main melody source - a bassline sequencer - a harmonized second voice - a transposable phrase generator - a programmable note bank for generative composition If you want, I can also turn this into: 1. a **patch cookbook** 2. a **beginner-friendly quickstart** 3. a **“best companion modules” guide** for Orbitals [Generated With Eurorack Processor](https://github.com/nstarke/eurorack-processor)