2hp — 3 to 1

Download the official 2hp 3:1 Manual (PDF)

Using the 2hp 3:1 to Build Full Songs in Eurorack

The 2hp 3:1 is a compact yet powerful voltage-controlled gate switch and summer. Its ability to route, combine, and algorithmically select gates/clocks makes it an excellent tool for transforming looped ideas into dynamic, evolving full-length tracks. Here’s how you can leverage its features for full song creation in a modular setup:

Core Functionalities Recap

Techniques for Arranging Full Tracks

1. Scene Switching and Section Changes

Use Case: Automate introduction, breakdowns, drops, etc.

How:
Patch three different rhythms (kick, snare, or clock patterns) into the three inputs. Use a sequencer, LFO, or an automation lane (SEL CV) to dynamically select between these inputs at different points in your track. By automating the SEL, the 3:1 will route only the desired rhythmic element, muting or unmuting sections.

Module Interactions:
- Sequencers (e.g. Pam’s New Workout, Hermod): Generate CV to select scenes. - Clock Dividers/Logic Modules: Change which gate is fed into each input for more complex transitions.

2. Polyrhythm Generation for Song Development

Use Case: Build complexity over time (e.g. intro = simple, mid-section = polyrhythms)

How:
Set 3:1 to SUM mode. Input three different rhythmic sources—perhaps one is a master clock, one a divided clock, and one a Euclidean trigger. The output sums concurrent inputs, creating new, evolving trigger streams (polyrhythms) that can fire off envelopes, percussion, or melodic events only later in the track.

Module Interactions:
- Euclidean Rhythms/Grids: Patch varied rhythms into inputs. - Gate/Trigger-Driven effects: Output goes to percussive modules or modulation triggers.

3. Arranging Drum Patterns and Song Sections

Use Case: Switch drum/perc patterns for verse/chorus structure.

How:
Feed different drum gate patterns (or clocked LFOs for movement/modulation) into inputs. Use SEL knob and/or SEL CV to “flip” between verses, choruses, fills, and drops live or via automation.

Module Interactions:
- Drum Modules (e.g., Mutable Peaks, Erica Pico Drums): Receive pattern changes. - CV Recorders: Capture and automate movement for playback.

4. Live Performance Transitions

Use Case: Perform sections or sudden parameter changes hands-on or automated.

How:
Using the SEL knob or an external controller (joystick/CV keyboard), manually transition between input sources for expressive, performative control over structure and energy.

Module Interactions:
- Manual CV Generators (e.g., FSR, touch plates): Control selection in real-time. - Switching FX sends or modulation sources for different song movements.

5. Thematic or Tonal Variation

Use Case: Change melodic/harmonic patterns without repatching.

How:
Send different quantized gate/trigger sequences that transpose, modulate, or open up new musical material at the output, routed to pitch sequencers or harmonic triggers.

Module Interactions:
- Quantizers/Sequential Switches: Use output to advance or change pitch values. - Arpeggiators: Change the clocking pattern for new phrases.

Patch Example for Song Structuring

  1. IN 1: Kick pattern (straight 4/4)
  2. IN 2: Fill pattern or alternate rhythm
  3. IN 3: Hi-hat pattern or breakdown clock
  4. OUT: Send to a drum module(s) or mix of voices
  5. SEL CV: Automated by your sequencer/automation lane to change song sections

This setup enables:

General Tips

The 2hp 3:1 is far more than just a switch—it’s a powerful arrangement and performance tool in a compact case, enabling morphing, evolving, and controlled transitions that turn patterns into complete, narrative-driven modular songs.

Generated With Eurorack Processor