Microsoft has confirmed a official "piece" of software to fix this—a phased rollout starting the last week of April 2026—but until that is fully deployed, several community-verified patches and workarounds exist. Immediate Patches & Workarounds
If loopMIDI is currently broken for you, use these steps found in Steinberg and Microsoft Community discussions: Restart the MIDI Service (Most Effective "Quick Fix"): Open Command Prompt as Administrator. Type net stop midisrv and press Enter. Type net start midisrv and press Enter.
Note: Ensure loopMIDI is open before you restart the service for the ports to re-register correctly. Clean Hidden Devices:
Open Device Manager, go to View, and select Show hidden devices.
Uninstall any greyed-out MIDI devices and re-install loopMIDI as an Administrator. Disable the New MIDI Stack:
For some users, disabling the new Windows MIDI services in the registry or settings until the final patch arrives has restored loopMIDI functionality. The "New" Piece: Windows MIDI Services Loop Midi hidden in Windows 11 25H2 fix - Page 2 - Cubase
This report analyzes the current status of loopMIDI on Windows 11 as of April 2026, focusing on compatibility issues caused by the new Windows MIDI Services rollout and available "patches" or workarounds. 1. Executive Summary
LoopMIDI is currently facing significant operational issues on Windows 11 due to a major overhaul of the OS's MIDI stack (Windows MIDI Services). While loopMIDI itself has not received a formal "patch" to solve these architectural changes, Microsoft has acknowledged a bug where third-party dynamic ports (like those from loopMIDI) become invisible to applications. A formal system-level fix from Microsoft is expected in late April or May 2026. 2. Current Technical Status
Version Info: The current stable version of loopMIDI is v1.0.16.27 (released May 2024). loopmidi windows 11 patched
Core Conflict: Windows 11 update KB5074105 (and subsequent previews) introduced a new MIDI 2.0-ready service. This service often fails to recognize dynamic ports created by loopMIDI unless specific startup sequences are followed.
The "Invisible Port" Bug: Users report that loopMIDI appears to run correctly, but its virtual ports do not show up in DAWs or other MIDI software. 3. Known Issues & Official Acknowledgments
Microsoft developers have confirmed that dynamic ports (loopMIDI, loopBE, teVirtualMIDI) are not always visible in the new MIDI stack.
Troubleshooting loopMIDI on Windows 11: Fixes and the New MIDI 2.0 Patch
Recent Windows 11 updates, particularly the rollout of Windows MIDI Services (incorporating MIDI 2.0), have caused compatibility issues with third-party virtual drivers like loopMIDI. Users have reported that loopMIDI ports often become invisible or "grayed out" in DAWs like Ableton, Studio One, and Cubase. Why loopMIDI Broke in 2026
The primary cause is a conflict between the legacy loopMIDI driver and the new Windows MIDI Service introduced in preview updates such as KB5074105 and KB577181. This new stack introduces native multi-client support and loopback capabilities, which can supersede or block existing third-party virtual cables. Immediate Workarounds
If your loopMIDI ports have disappeared, you can often restore them without a patch by manually resetting the Windows MIDI service:
Stop and Start the Service: Open Windows Tools → Services, find Windows MIDI Service, click Stop, and then Start (avoid "Restart," as users report it is less effective). Microsoft has confirmed a official "piece" of software
Order of Operations: Start loopMIDI first to create the ports, then cycle the Windows MIDI Service, and finally open your music software.
Uninstall Preview Updates: If the issues persist, uninstalling preview update KB5074105 has been confirmed by users to restore legacy MIDI functionality. The Official "Patched" Solution
Microsoft has acknowledged these breakages and is rolling out permanent fixes.
Official Patch Rollout: A fix designed to ensure compatibility for loopMIDI and similar dynamic ports began rolling out on April 30, 2026 via the 30-day Controlled Feature Rollout (CFR) process.
Early Access Fix: For users who cannot wait, a "proper fix" for loopMIDI and rtpMIDI that removes startup order requirements is available on the Microsoft MIDI Discord in the #early-preview-releases channel.
Native Replacement: Windows 11 now includes Native MIDI 1.0 Loopback endpoints. You can manage these via the new MIDI Settings app (available in the SDK runtime), which performs the same function as loopMIDI but is built directly into the OS. Comparison: loopMIDI vs. Native Windows Loopback Loop Midi hidden in Windows 11 25H2 fix - Page 2 - Cubase
LoopBe1, a popular virtual MIDI loopback device for Windows, has been a go-to solution for many users seeking to create a virtual MIDI cable. However, with the evolving landscape of technology and the introduction of Windows 11, ensuring compatibility and enhancing features becomes crucial. Let's conceptualize a feature development plan for LoopBe1 or a similar tool, focusing on Windows 11 compatibility and additional functionalities.
For musicians, DJs, and sound designers, MIDI (Musical Instrument Digital Interface) remains the backbone of digital music production. While physical MIDI cables have their place, virtual MIDI routers have become essential for routing MIDI data between software applications on the same computer. Creates virtual MIDI cables to route MIDI between apps (e
One of the most popular tools for this purpose is loopMIDI by Tobias Erichsen. Lightweight, free, and reliable, loopMIDI has served as the go-to virtual MIDI port creator for Windows users for over a decade.
However, with the arrival of Windows 11 — and subsequent cumulative updates — many users started encountering driver signature errors, installation failures, and runtime crashes. This led to a growing demand for a “loopMIDI Windows 11 patched” version.
In this article, we’ll explore what loopMIDI does, why Windows 11 broke it, what “patched” means in this context, how to apply patches safely, and what alternatives exist.
Even with a patched version of LoopMidi, users might encounter issues. Here are some common problems and their solutions:
MIDI Device Not Recognized: Ensure that your MIDI device is properly connected and that you've selected the correct MIDI port in LoopMidi and your music software.
Software Crashes: If LoopMidi crashes frequently, ensure you're using the latest patched version. Also, try running the software in compatibility mode or as an administrator.
No MIDI Output: Check your MIDI cable connections, and ensure that the receiving device or software is set to receive MIDI data from the correct port.
KMODE_EXCEPTION_NOT_HANDLEDGo to the official source: Tobias Erichsen’s website (www.tobias-erichsen.de). Look for loopMIDI version 1.1.0 or newer. The file name may explicitly say "signed."