4ms-listen-io

4ms Listen IO

Dual interface for external gear integration

8 HP Eurorack module

The Listen IO is a dual-channel interface module that converts external signals to modular levels and modular signals back to line/headphone levels. It features independent gain and level controls with LED bar graphs, making it essential for integrating external gear like guitars, synths, and microphones into your Eurorack system while providing stereo headphone monitoring.

Features

  • Up to 30x gain (+30dB) for line to modular conversion
  • Dual LED bar graphs showing signal level and clipping
  • Two headphone outputs with channel swapping
  • INS and OUTS headers for expansion modules
  • Works with guitars, microphones, and most external gear
  • Reverse polarity protection

Controls & Jacks (14)

  • Gain
  • Level
  • Line In L
  • Line In R
  • Mod Out L
  • Mod Out R
  • Mod In L
  • Mod In R
  • Line Out L
  • Line Out R
  • Gain L LED
  • Gain R LED
  • Level L LED
  • Level R LED

How-To Guides

  • Guitar Processing Chain
  • Stereo Headphone Monitoring
  • Microphone Ambient Textures
  • Drum Machine Integration
  • Keyboard Split Processing
  • Controlled Feedback Loops
  • Resampling and Recording
  • Phone or Tablet as Sound Source

Explore the interactive Listen IO panel on BleepDex — tap any control to learn what it does.

8c571ce