F_MROUTZ – MIDI Channel Router and Poly/Mono CV Splitter

F_MROUTZ is a compact MIDI routing utility for Voltage Modular designed to split incoming MIDI data into multiple independent destinations based on MIDI channel. The module combines polyphonic CV routing for advanced poly synth modules such as F_DEXZ with additional monophonic pitch/gate/velocity outputs for driving mono synth voices, bass modules, sequencers, percussion patches, or external control systems.

The module accepts one incoming MIDI stream and distributes note data according to user-selected MIDI channels. Two independent polyphonic output sections can route full polyphonic note streams to compatible poly-CV modules. In addition, up to five monophonic output sections convert selected MIDI channels into traditional pitch CV, gate, and velocity signals.

F_MROUTZ is intended as a flexible MIDI utility rather than a traditional keyboard split module. It allows multiple synth structures inside a Voltage Modular patch to respond independently to different MIDI channels from one controller, DAW, hardware sequencer, or external MIDI source.

Polyphonic Routing

The two POLY sections output true polyphonic pitch, gate, and velocity signals through Voltage Modular poly jacks. These outputs are designed for direct connection to polyphonic modules such as F_DEXZ or other compatible polyphonic CV-based instruments.

Each POLY section contains a dedicated MIDI channel selector. Incoming MIDI notes that match the selected channel are converted into polyphonic voice data and distributed internally across up to sixteen voices. Pitch CV, gate state, and velocity are preserved separately per voice.

The polyphonic outputs are:

• P = Polyphonic pitch CV
• G = Polyphonic gate
• V = Polyphonic velocity CV

Pitch follows the standard 1V/octave convention. Gate outputs use standard modular gate levels. Velocity outputs are scaled to modulation-friendly voltage ranges.

Monophonic Routing

The MONO sections convert MIDI note data into standard monophonic modular control signals. Each mono section contains its own MIDI channel selector and independent pitch, gate, and velocity outputs.

The monophonic outputs are:

• P = Pitch CV
• G = Gate
• V = Velocity CV

The monophonic engine uses last-note priority. When multiple notes are held on the same MIDI channel, the most recently pressed note becomes active. Releasing notes automatically restores the previous held note when appropriate.

This allows F_MROUTZ to drive traditional mono synth patches, bass voices, lead synths, percussion voices, or utility modules that expect standard pitch and gate signals.

Typical Usage Examples

One common setup is routing different MIDI channels from a DAW or hardware controller into separate synth structures inside a Voltage Modular patch.

Example:

• MIDI Channel 1 → F_DEXZ polyphonic pad
• MIDI Channel 2 → second polyphonic synth layer
• MIDI Channel 3 → mono bass synth
• MIDI Channel 4 → mono lead synth
• MIDI Channel 5 → percussion trigger system

This allows complex multi-timbral patches to be built inside a single Voltage Modular environment while keeping all routing centralized inside one compact module.

Design Philosophy

F_MROUTZ focuses on practical modular MIDI distribution with minimal panel space and fast workflow. Instead of requiring multiple MIDI-to-CV modules and external routing utilities, the module provides centralized channel-based routing for both polyphonic and monophonic signal paths inside one compact utility module.

The module is especially useful in larger modular systems containing multiple synth voices, layered patches, independent sequencer structures, or combined mono/poly performance setups.