The Noise Engineering Opp Ned is an 8HP Eurorack quad arpeggiator. It plays one shared arpeggio across four pitch CV outputs, and each channel is clocked by its own trigger input. It suits modular players who want voltage-controlled arpeggios that stay simple to set up and can follow an external sequencer through a quantized transpose input. The name is Norwegian for "up" and "down".
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Four independent channels: one arpeggio feeds four outputs, each advanced by its own trigger input.
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CV over playback: octave range (1, 2 or 3), direction (Up, Down, Up/Down) and shape all have switches and matching CV inputs.
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Three shapes: Pln steps through notes in order, Zig moves one up, one down, then jumps two, and Rnd plays notes in random order.
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12 pattern memories: load, edit and save arpeggios, then recall them by hand or with a dedicated CV input.
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Transpose input: the Xpose CV is added to all four outputs for key changes driven by another sequencer.
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Reset and freeze: a trigger or button press returns every channel to the first step. Holding the button freezes the current step.
Building patterns happens on a 12-LED keyboard display. Set the mode switch to Edit, turn the encoder to a note and tap it to add or remove it. Hold the encoder on an active note to make it the root. The factory set covers eight tetrads, including a degenerate tetrad of three stacked major thirds, plus major, pentatonic major, minor third and pentatonic minor scales.
To get started, patch a clock or trigger into input 1 and send output 1 to an oscillator's 1V/oct input. Feeding different rhythms into the other trigger inputs gives you interlocking lines that share the same notes but move independently. That makes the module useful for polyrhythmic arpeggios and multi-voice patches from a single pattern.