Expert Sleepers FH-2 (2018–)
A Eurorack USB MIDI host module and MIDI to CV converter, succeeding the FH-1 with added USB device capability
Overview
The Expert Sleepers FH-2 'factotum' is an 8HP Eurorack module designed as a comprehensive interface between USB/MIDI hardware and modular synthesizer systems. It functions as both a USB MIDI host and a USB MIDI device, making it a flexible successor to the FH-1. Announced as shipping on June 29, 2018, the FH-2 expands on its predecessor by enabling bidirectional USB connectivity. It supports polyphonic MIDI to CV conversion, including MPE operation, and integrates multiple timing and modulation tools such as MIDI clock dividers, LFOs, and envelope followers. A firmware update released on April 17, 2025, added support for Rev 2 hardware and Select Bus functionality.
Specifications
| Panel width | 8HP |
| Dimensions (W x D) | 8 HP x 48 mm |
| Power requirement | 118 mA at +12 V, 48 mA at -12 V |
| Power requirement | plus the power requirement of any attached USB device |
| Features | Rotary encoder with push button |
Design
The FH-2 combines MIDI to CV conversion—including polyphonic and MPE operation—with MIDI clock processing, voice mapping, and USB host/device switching in a single 8HP module. It acts as a central bridge for integrating digital MIDI gear with analog Eurorack systems.
Context
The FH-2 is the successor to the Expert Sleepers FH-1 USB MIDI host, adding the ability to operate as a USB MIDI device. It occupies a high-end role in the modular ecosystem, designed for users needing deep integration between computers, MIDI controllers, and modular synths.
Market
Used units have been listed for £190 in excellent condition, while price comparison sites show current new prices starting at $288.55. A new production batch was confirmed to be shipping in early 2026.
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