# Intellijel — Unity - [Manual PDF](../../manuals/unity-mixer_manual_2020.04.15.pdf) --- [Unity Mixer Manual (PDF)](attachment) # Intellijel Unity Mixer — melodic use in a Eurorack system The **Intellijel Unity Mixer** is a very simple but very useful utility for building melodic patches. It is a **dual 3:1 unity-gain mixer**, or a **single 6:1 mixer** if the top output is left unpatched. Because it works with **CV or audio**, it can help with melody creation in two main ways: 1. **Combining pitch-related CV sources** 2. **Combining audio signals that form layered melodic voices** --- ## What the module does ### Basic structure - **Top section:** inputs **1, 2, 3** summed to output **4** - **Bottom section:** inputs **5, 6, 7** summed to output **8** - If **output 4 is unpatched**, the top mix is internally sent to the bottom mixer, turning it into a **6:1 mixer** with final output at **8** ### Important behavior - It is **unity gain**: signals are **summed but not attenuated or amplified** - Outputs are **phase correct** (non-inverting) - Works for **audio or CV** - **Maximum output voltage: 10.5 V** - Above that, it can **clip** - Rear jumpers can set either mixer to **-6 dB attenuation** for more headroom --- # How it helps create melodic components ## 1. Build pitch CV from multiple sources This is one of the most musically useful roles for a unity mixer. In Eurorack, melodic pitch often comes from several CV layers added together: - a **main pitch sequence** - a **keyboard or transpose offset** - **octave offsets** - a **vibrato or slow pitch modulation** - a **slewed variation** - a **quantized random source** The Unity Mixer lets you **add these together into one pitch stream**. ### Example patch: transposable melody Patch: - **IN 1:** sequencer pitch CV - **IN 2:** keyboard/manual voltage offset or precision adder-style transpose source - **IN 3:** slow LFO through attenuation for subtle vibrato - **OUT 4:** to oscillator 1V/oct input Result: - Your melody plays from the sequencer - The second CV transposes it - The third adds expressive movement ### Musical note Because this is a **plain summing mixer**, it does not quantize or scale pitch. So for precise melodic work: - use already-scaled pitch CV - attenuate modulation before mixing if needed - ideally place a **quantizer after the mixer** if the sources aren’t pitch-accurate --- ## 2. Create interval stacks and harmonized lines You can use the module to sum several fixed voltages or tuned offsets into a melodic line. ### Example patch: harmony shaping Patch: - **IN 1:** main pitch sequence - **IN 2:** offset voltage representing a fixed interval - **IN 3:** manual offset for octave switching - **OUT 4:** to a quantizer, then oscillator Result: - The mixed voltage can generate melodic lines with harmonic movement - Sending the sum into a quantizer helps “lock” the combined voltages to a scale This works especially well for: - transposed basslines - modal melody shifts - octave jumps - adding phrase variation --- ## 3. Mix modulation sources that shape melodic phrasing Melody is not only pitch. It also includes **expression**, **phrasing**, and **motion**. The Unity Mixer can combine CV sources controlling: - filter cutoff - wavefolder amount - FM depth - VCA amplitude - LPG response ### Example patch: expressive melody contour Patch: - **IN 5:** envelope - **IN 6:** slow LFO - **IN 7:** stepped random CV - **OUT 8:** to filter cutoff of your melodic voice Result: - The envelope gives note articulation - The LFO adds movement across the phrase - The random CV creates evolving timbre per note This makes a simple melody feel much more alive. --- ## 4. Layer oscillators into a richer melodic voice Since the Unity Mixer also handles audio, it is useful for building a **multi-oscillator melodic sound source**. ### Example patch: layered lead Patch: - **IN 1:** VCO saw wave - **IN 2:** VCO pulse wave - **IN 3:** sub-oscillator or sine one octave below - **OUT 4:** to filter or VCA Result: - A thicker, harmonically rich lead or bass tone - Great for mono melodic lines ### Example patch: two-voice blend Use top and bottom sections separately: - Top mixer for one melodic voice’s oscillator blend - Bottom mixer for another melodic layer or a parallel modulation sum --- ## 5. Use 6:1 mode for complex melodic control If **output 4** is left empty, the top three inputs feed the bottom mixer, giving you a **6-input sum** at **output 8**. This is very useful when you want many small melodic influences combined into one destination. ### Example patch: complex pitch ecosystem - **IN 1:** main sequencer pitch - **IN 2:** transpose CV - **IN 3:** octave offset - **IN 5:** subtle vibrato - **IN 6:** random stepped CV - **IN 7:** manual performance offset - **OUT 8:** to quantizer or oscillator pitch input Result: - One highly composite melodic CV stream - Excellent for generative or semi-generative melody systems --- # Best melodic patch strategies ## Strategy 1: Put a quantizer after the Unity Mixer This is probably the strongest melodic use. Why: - multiple CV sources summed together often drift off exact semitone values - a quantizer after the mix turns those combined voltages into scale-aware notes ### Patch flow `Sequencer + transpose + random + vibrato -> Unity Mixer -> Quantizer -> VCO 1V/oct` This gives: - controlled pitch additions - musically stable results - evolving but tonal melodies --- ## Strategy 2: Use it before a precision-sensitive destination only with care Because the Unity Mixer is not specifically described as a **precision adder**, I would not rely on it as a perfect replacement for one in highly exact pitch applications over wide ranges. It is still very useful musically for: - short-range melodic transposition - adding expressive CV - summing already modest pitch offsets Best practice: - keep pitch modulation subtle unless quantized afterward - test tuning if using it directly into 1V/oct --- ## Strategy 3: Use the attenuation jumpers for hot audio sources If you are mixing several oscillators for a melodic voice, the summed level can exceed the module’s **10.5 V max output** and clip. The manual notes: - each half has its own **-6 dB attenuation jumper** - useful for **high amplitude sources such as raw VCO outputs** That means if you are building: - supersaw-style leads - stacked bass oscillators - thick drones with melodic articulation then enabling attenuation can preserve headroom and keep the tone cleaner. --- # Patching ideas for melodic music ## 1. Transposing sequence mixer Use the top mixer for pitch: - sequencer - offset row from another sequencer - keyboard transpose Send to: - quantizer - oscillator Good for: - basslines - arpeggios - lead motifs --- ## 2. Melody + ornament CV mixer Use the top mixer to combine: - main pitch - short envelope into pitch for attack “pluck” - tiny random CV Send to oscillator pitch. Good for: - acid-style lines - animated plucks - pseudo-acoustic articulation --- ## 3. Audio voice stacker Use the top mixer for: - oscillator A - oscillator B detuned - sub oscillator Then send to: - filter - VCA Use bottom mixer for: - second voice - noise + tone blend - parallel melody layer Good for: - lead voices - basses - unison melodic sounds --- ## 4. CV phrase shaper Use the bottom mixer for: - envelope - LFO - manual offset Send to: - wavefolder - filter FM - VCA CV input Good for: - adding expression to repeating melodies --- ## 5. Generative melodic bus in 6:1 mode Combine: - sequence - random source - clocked offset - slow drift - manual transpose - octave offset Then quantize the result. Good for: - ambient - Berlin-school style evolving lines - generative techno melodies --- # Pairing with Intellijel Triatt or Quadratt The manual specifically mentions that Unity Mixer pairs well with **Triatt** and **Quadratt**. This is especially important for melodic patching because those modules provide the control that Unity Mixer lacks: - attenuation - offset - manual level control ### Strong combo - Use **Triatt/Quadratt** to scale pitch modulation or audio levels - Send their outputs into **Unity Mixer** - Use Unity Mixer to create the final combined melodic CV or audio voice ### Example As the manual suggests: - patch 3 Quadratt outputs into Unity Mixer’s top inputs - patch Unity Mixer output back into the 4th Quadratt channel This gives: - a **3:1 mix** - plus a **master level control** For melodic work, that means: - 3 oscillators into Unity Mixer - summed output back to Quadratt - Quadratt channel 4 becomes your lead voice volume/tone control path Very practical for performance. --- # Practical limitations to keep in mind ## No knobs, no mute switches, no level controls This is not a performance mixer. It is a **set-and-forget utility mixer**. So for melodic patching, it works best when: - sources are already at the right level - you want compact routing - you don’t need live balancing on the module itself ## Output clipping at 10.5 V Important for: - stacked audio oscillators - summed positive CV If your melodic patch behaves oddly or sounds harsh, clipping may be the reason. ## Not a dedicated precision adder For exact pitch summing across many octaves, a dedicated precision adder is usually safer. But for many musical uses—especially with quantizers or moderate offsets—this module is still very handy. --- # Best overall melodic roles for the Unity Mixer The most useful melodic applications are: - **Combining pitch CV sources** - **Creating transposition buses** - **Mixing multiple modulation sources for phrasing** - **Layering oscillators into richer melodic voices** - **Building complex generative melody control signals** - **Submixing audio or CV in very little rack space** In a melodic Eurorack system, this is less of a “feature module” and more of a **glue module**. It helps separate melodic ideas become one playable signal. --- # Technical summary - **Width:** 2 hp - **Depth:** 39 mm - **Current draw:** 11 mA @ +12V, 14 mA @ -12V - **Modes:** dual 3:1 or single 6:1 - **Signal type:** audio or CV - **Max output:** 10.5 V - **Optional attenuation:** -6 dB per section via rear jumpers --- [Generated With Eurorack Processor](https://github.com/nstarke/eurorack-processor)