MIDI DATA LOGGER

🇺🇸 MADE IN THE USA 🇺🇸

Harrison Labs MIDI Data Logger

Precision MIDI diagnostics for every pro audio environment — home setups, studios, listening rooms, theaters, stages, and auditoriums.

Real-time hex + note decoding

Displays every MIDI message in hexadecimal as it happens. On Channel 1, note on/off messages are automatically decoded into note name and channel number for fast, readable diagnostics — perfect for a home studio, where you’re verifying that a MIDI keyboard, controller, or synth is communicating correctly with your DAW.

Non-intrusive, thru-jack design Two MIDI thru connectors pass signal without degradation, so the logger can be inserted anywhere in an existing rig — inline in a home studio’s setup, between a stage control console and a sound module, or in a theater booth — without altering the signal path. Only the source needs to be connected for logging to work.

Two capture modes

• Continuous — streams live message data, ideal for monitoring an active performance on stage or in a theater in real time.

• Direct — captures and holds the first MIDI message, clearing only when the mode switch is toggled. Useful for isolating a single event during setup or troubleshooting in acoustically sensitive spaces where repeated triggering isn’t practical.

Self-powered, zero-load
Runs on a standard 9V battery, drawing no power from the MIDI signal source itself — important whether you’re working on a home rig or a fully-loaded installed system in a studio, auditorium, or stage.

Application & Troubleshooting Guide

Studios: Quickly identify data errors or "stuck notes" in complex sequencing setups by monitoring the MIDI signal path for transparency.

Home Use & Acoustic Environments: Use this device to verify connectivity and ensure seamless communication between MIDI controllers, keyboards, and digital audio components in your home theater, listening room, or any high-fidelity acoustic space. Because it is battery-powered, it provides a non-intrusive way to diagnose issues without affecting your audio gear.

Theaters & Auditoriums: Troubleshoot long cable runs and diagnose intermittent communication issues between remote MIDI controllers and sound generators. The hexadecimal display allows you to pinpoint precisely where a signal may be dropping out across large physical distances.

Live Stages: Verify signal integrity between MIDI controllers and rack-mounted synthesizers during setups. Use "Direct Mode" to capture and store the first MIDI message received, allowing you to isolate specific triggers or intermittent data bursts while on stage.

Included: Standard MIDI message reference chart listing all messages and their corresponding hex codes.