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Orthogonal Devices ER-101 Indexed Quad Sequencer

Orthogonal Devices ER-101 Indexed Quad Sequencer

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Page last updated Mar 30, 2026

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Description

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Step into a new realm of musical creativity with the Orthogonal Devices ER-101 Indexed Quad Sequencer, an innovative piece of gear that redefines what modular synthesizers can achieve. This 4-track sequencer is designed for musicians who demand precision and flexibility, offering a deep toolkit to craft intricate sequences with ease and clarity. The ER-101 allows you to unleash your musical ideas with its unique approach to sequence manipulation, providing both beginners and seasoned producers with a powerful yet intuitive interface.

Equipped with a high-resolution LED display, the ER-101 ensures you have a clear view of your sequences as you tweak, modify, and perfect your sound. The 256-step maximum sequence length per track empowers you to build complex compositions or keep it simple with minimalistic loops. Its highly customizable nature lets you explore beyond conventional boundaries, making it a favorite in both studio settings and live performances.

With the Orthogonal Devices ER-101, you gain the advantage of real-time control over your sequences, enabling spontaneous creativity and adaptation without missing a beat. Whether you're diving into experimental soundscapes or crafting the next chart-topping hit, this sequencer is your trusty companion on the journey of sound exploration.

Key Features:

4-track sequencer with independent control for each track
LED display for precise, real-time feedback
256-step maximum sequence length per track
Real-time editing and manipulation
Highly customizable interface for endless creative possibilities
Ideal for both studio production and live performances

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Richard Easel

ER-101 Orthogonal Devices - Review

Richard Easel

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Orthogonal Devices ER-101 Indexed Quad Sequencer.

Features and functionality

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The ER-101 allows for non-destructive transformations controlled by CV, enabling dynamic modifications like adding a fifth to every third step when a gate is high.
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It supports custom scales with 1mV resolution, beneficial for microtonal work or ensuring perfect tracking with oscillators without additional calibration.
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Users mention the importance of setting the Pamela’s New Workout clock channel to x24 for synchronization with the ER-101, crucial for timing drum rhythms with melodies.
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User experience

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Owners indicate that the ER-101 excels as a CV-sequencer rather than a pitch/voice sequencer, due to its unique step duration handling and mathematical transformations.
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Comparisons

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The Eloquencer is praised for its intuitive interface, while the ER-101 is noted for its complexity and depth, making it more suitable for detailed, transformative sequencing tasks.
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Use cases and applications

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With the ER-102, the ER-101 can record high-resolution sequences, offering minimal quantization and the ability to load MIDI files for precise performance control.
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There is a notable demand for more content demonstrating practical use cases of the ER-101, indicating its complexity and the desire for user-driven tutorials.
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