Description

Mutable Instruments CVpal, $79!

The Mutable Instruments CVpal is a DIY USB MIDI-to-CV interface designed to bridge the gap between digital devices and analog synthesizers or modular systems. By connecting to a computer or smartphone/tablet via USB, the CVpal enables control over analog gear without the need for additional drivers, thanks to its class-compliant design. It offers various conversion and voice allocation modes, accommodating monophonic, duophonic, and drum trigger applications.

Specifications:

  • Width: 4HP
  • Depth: N/A
  • Power Consumption: Powered via USB; no external power source required.
  • Outputs:
    • CV Outputs: 2 channels (0V to 4V range, covering 4 octaves)
    • Gate Outputs: 2 channels (5V high level, V-trig with direct polarity)
  • Compatibility: Optimized for iOS, macOS (≥10.6.3), and Linux (kernel ≥2.6). Other operating systems may experience latency up to 8ms.
  • Country of Manufacture: France

Functionality: The CVpal interprets MIDI messages differently based on the MIDI channel received, offering multiple operational modes:

  • Channel 1: Monophonic mode with note CV, velocity CV, and dual gate outputs.
  • Channel 2: Enhanced monophonic mode where Gate 1 outputs a digital square wave oscillator corresponding to the MIDI note.
  • Channels 3 & 4: Dual monophonic mode, acting as two independent converters for each channel.
  • Channel 5: Duophonic mode with voice stealing, providing two note CV outputs and shared gates.
  • Channel 6: Controller conversion mode, translating MIDI CCs (01 and 02) to control voltages.
  • Channels 7 & 8: Monophonic note conversion with additional CC output.

These modes enable versatile control setups, from simple note triggering to complex modulation assignments.

Notable Features:

  • DIY-Friendly: Offered as a kit, the CVpal provides an accessible project for enthusiasts interested in building their own MIDI-to-CV interface.
  • Compact Design: With a slim 4HP width, it integrates seamlessly into Eurorack systems without occupying significant space.
  • Class-Compliant USB: Ensures straightforward connectivity with modern devices without the need for proprietary drivers.

Considerations:

  • USB Device Limitation: The CVpal functions as a USB device, not a host. It connects to active devices like computers and smartphones but cannot interface directly with USB MIDI controllers.
  • Voltage Range: The CV outputs range from 0V to 4V, covering four octaves. Users requiring a broader range may need additional scaling modules.
  • Gate Output Levels: Gate outputs are 5V, which is compatible with most Eurorack modules. Modules requiring higher gate voltages may need level conversion.