Orthogonal Devices ER-101 Indexed Quad Sequencer – A Deep Sequencer For Eurorack Modular Synthesizers

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Brian Clarkson of Orthogonal Devices let us know about their ER-101: Indexed Quad Sequencer, ‘a new kind of Eurorack sequencer.’

Clarkson calls the ER-101 ‘a real-time composition, sequencing, and automation environment”. It lets you create sequences of thousands of steps, with variable duration, variable gate length, arbitrary scales, smooth transitions, save/recall device state and more.

Here’s a demo of the ER-101 in action:

Features:

  • 4-track sequencer
  • stepped and smooth voltage transitions
  • each track has 3 outputs: 2 CVs + 1 gate
  • each track has its own adjustable loop points
  • each track contains up to 100 patterns and each pattern can contain up to 100 steps
  • each step can be individually adjusted to have 0-99 clock cycles in duration
  • each gate can be individually adjusted to have 0-99 clock cycles in duration with or without ratcheting
  • CVs are chosen (indexed) from voltage tables of which there are 2 per track (A & B)
  • built-in voltage tables: 12-tone equal tempered, 22 shrutis, linear 0-8V, exponential 0-8V, linear-exponential 0-8V and others
  • voltage tables are user-editable and have 100 entries per table
  • voltages between 0.000-8.192V at 2mV increments can be dialed in
  • smoothing can be enabled for individual steps, entire patterns and/or entire tracks
  • smoothed transitions are NOT simply slews but are adjusted to match the current tempo in real-time
  • hold feature (complete double-buffering of device state) allows smooth musical edit-commit-at-will while the sequencer is running
  • while in hold mode, committing changes to a running sequence can be either immediate or quantized to the beat
  • reset can be either immediate or quantized to coincide to with the ending of the current track, pattern, or step
  • stores up to 16 snapshots of the state of the entire device
  • arbitrary insert/delete of patterns/steps with clipboard style copy/paste
  • math button allows you to specify a mathematical operation to apply to a step, a pattern or a track.
  • expansion port
  • firmware upgradeable via USB

The ER-101: Indexed Quad Sequencer is priced at US Price: $470. See the Orthogonal Devices site for details.

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