i2 Instrument Interface V2.4 PCB
Best modular interface for connecting external instruments to Eurorack systems.
The Befaco i2 Instrument Interface V2.4 PCB is designed to bridge the gap between modular synthesizers and external instruments. It features an envelope follower circuit that generates a control voltage proportional to the amplitude of an incoming audio signal, enabling direct interaction between your modular system and other sound sources. The module includes a preamp with adjustable gain, a band-pass filter to select frequency ranges, and an envelope follower with selectable response velocities. Additionally, it offers an envelope regenerator for controlling attack and decay times, and a trigger extractor for generating gate and trigger signals based on signal amplitude. This Eurorack module facilitates seamless communication and control between diverse musical setups.
$25.00
Owner Satisfaction
4.4
/ 5
Category Rank
1017
/ 1560
#1017 in Development Boards
Price vs Category Average
-71%
Below average
Brand
Befaco
/ Befaco
Who it's for
- Musicians wanting to integrate external instruments into their modular synth setup.
- Hobbyists who enjoy soldering and assembling their own Eurorack modules.
- Producers needing reliable signal level matching between gear and Eurorack.
Who should skip it
- Beginners without prior experience in electronics assembly or soldering.
- Builders expecting a complete kit or a pre-assembled, ready-to-use module.
- Users seeking modules for sound generation or complex effects.
Key Specs
Brand
Befaco
HP
11
Depth
45mm
+12V
40mA
-12V
35mA
Additional Resources
Build Guide
Features
- Envelope follower for amplitude control
- Preamp with adjustable gain
- Band-pass filter for frequency selection
- Selectable envelope response velocity
- Envelope regenerator with attack/decay control
- Trigger extractor for gate and trig outputs
- Eurorack format module
What customers say
Customers consistently praise the i2 Instrument Interface V2.4 PCB by Befaco for its straightforward integration into DIY modular setups. Builders appreciate the clear layout and robust design, which contributes to a reliable final product. The quality of the PCB and included components, when part of a kit, often exceeds expectations, making the assembly process smooth even for those with moderate soldering experience. This interface is seen as a solid foundation for connecting external instruments, offering dependable performance once completed. Its value is frequently highlighted, providing an accessible entry point for expanding Eurorack capabilities.
Know before you buy
The i2 Interface allows you to integrate external instruments like guitars, microphones, or line-level devices into your Eurorack modular system. It converts incoming audio signals into control voltages, enabling your modular gear to react to the dynamics and frequency content of your external instruments.
Yes. The module includes a built-in trigger extractor that generates gate and trigger signals based on the amplitude of your incoming audio, making it easy to sync your modular patches to external performances.
The envelope follower tracks the volume of your incoming audio and outputs a corresponding control voltage. You can adjust the response velocity to determine how quickly the module reacts to the signal, allowing for anything from smooth, natural tracking to snappy, percussive responses.
Yes, the module features an integrated preamp with adjustable gain, allowing you to boost quieter signals to a level suitable for your modular system. It also includes a band-pass filter, which helps you isolate specific frequency ranges to ensure the envelope follower tracks only the parts of the signal you want.
The i2 Instrument Interface occupies 11 HP of rack space and has a depth of 45mm. It requires 40mA from the +12V rail and 35mA from the -12V rail.
The i2 V2.4 is a PCB-based kit, so it is well-suited for those with basic soldering skills. Befaco provides a comprehensive build guide to assist you through the assembly process.
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