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Conductive Labs MRCC firmware

Conductive Labs active Device launched 2021
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Latest firmware

1.1.095
released 10 Sep 2025
Download firmware from conductivelabs.com · needs Teensy Loader

What's new in 1.1.095

- Warning: this release changes the format of the MRCC’s USB Device name (if you were not already using the beta version) so it will undoubtedly mess up the naming in your DAW or MacOS Audio MIDI settings. See instructions below to clear old names from the OS so the new name(s) will be used. Features: - Number of simultaneous routes (per patch) allowed/saved/recalled has been increased from 50 to 255. - A number of routes counter was added to the top left corner of the Activity screen. The counter turns Red once the maximum number of routes is reached. Fixes: - MRCC MIDI Cntrl Port won’t save when greater than P06 (P07 through P12 would revert to “-” on power cycle). - Enhancements to MIDI buffering and SysEx message handling. For large SysEx transfers (>10k), we suggest halting other MIDI sources to remove merged data, just to be on the safe side. MRCC can process messages after a SysEx end of message (F7), but will not interrupt or mix a SysEx message with MIDI realtime messages. Enhancements to MRCC USB Device enumeration: - Multiple MRCCs will now be recognized as unique devices by Windows current MIDI API when each is assigned a unique name (set on MRCC Settings page 4/4). It’s allowed to leave one MRCC named the default name, or change each MRCC to have a name with a letter, e.g., MRCC-A, MRCC-B, etc. - MRCC “PC Name” (Settings page 4/4), which allows you to select an alternate USB device name for MRCC has been reworked to prevent a race condition that caused the original name to re-appear sometimes. - The name “MRCC” is also changed; trailing nulls were replaced by spaces. It might affect how the name appears in your software, unless you already changed the name using the “PC name” settings on Settings page 4/4. See instructions for clearing Windows USB device cache below. [...]

Last checked 29 Oct 2026

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How to update the Conductive Labs MRCC

Install the Teensy Loader (teensy.exe for Windows or teensy.dmg for Mac, linked on the Conductive Labs downloads page). Download the latest MRCC firmware ZIP from the downloads page and extract the .hex file. Connect the MRCC's PC USB port (USB type B) to your computer, run Teensy Loader, choose File > Open HEX File and select the .hex file. Click the green Auto button so it is lit, then briefly press the recessed FW button (hole on the right-side end cap) with a pen or paper clip. Programming takes about 3 seconds and the MRCC restarts. If firmware is older than 1.1.077, updating is mandatory. If you get a 'file too large' message, check that Auto is lit and press FW again; connect directly to the computer, not through a USB hub.

What you need

Teensy Loader — the software Conductive Labs uses to load firmware onto the Conductive Labs MRCC. Download links below.

Just for reference. For complete and up-to-date instructions, always refer to the manufacturer's official firmware page.

Drivers & software for the Conductive Labs MRCC

The Conductive Labs MRCC is updated with Teensy Loader, published by Conductive Labs.

Download Teensy Loader from Conductive Labsopens in a new tab — pjrc.com

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Conductive Labs MRCC firmware update history

Changelogs summarised from the manufacturer's release notes.

1.1.09510 Sep 2025

Release notes for this version are listed above.

Release notesopens in a new tab — conductivelabs.com

Tracked in 2 rigs on FW//RADAR.

Conductive Labs MRCC firmware FAQ

What is the latest firmware for the Conductive Labs MRCC?

The latest firmware for the Conductive Labs MRCC is version 1.1.095, released on 10 Sep 2025. FW//RADAR last checked Conductive Labs's official page on 29 Oct 2026.

How do I update the Conductive Labs MRCC?

Install the Teensy Loader (teensy.exe for Windows or teensy.dmg for Mac, linked on the Conductive Labs downloads page). Download the latest MRCC firmware ZIP from the downloads page and extract the .hex file. Full instructions on Conductive Labs's official firmware page.

What software do I need to update the Conductive Labs MRCC?

You need Teensy Loader, available from pjrc.com.

Where can I download Conductive Labs MRCC firmware and drivers?

Directly from Conductive Labs's official firmware page — FW//RADAR links to the source and never hosts firmware files. Official firmware page →

Where can I find the Conductive Labs MRCC manual?

The official Conductive Labs user manual is a PDF hosted on cdn.shopify.com. Conductive Labs MRCC user manual (PDF) →