An MPC operating system (MPC OS) is the software that actually runs all legacy hardware MPCs, and is also referred to as the MPC firmware. After the release of each MPC, operating system bugs were usually discovered by end users, so new operating system versions are released over time to fix the reported bugs (or to add new features). If you are experiencing any bugs or problems with your MPC, ensuring you have the latest operating system should be the first step in the road to (hopefully) fixing the problem. However you should be aware (based on the bug reports on MPC-forums.com) that most MPCs running Akai OS still have some bugs remaining, especially the MPC5000, and some bugs may arise purely from hardware problems inherent within your specific unit, so not all problems will be solvable.
Please note that this page is specifically for ‘legacy MPC’ models. If you have a ‘new generation’ MPC such as the MPC X, MPC Live or an MPC Software controller, you can download the current firmware and software releases from within your Akai account.
Legacy Akai MPC Operating Systems
These are the official Akai operating systems for legacy MPCs only – note that the MPC60 OS is not available as a standalone file as it is hard coded into the unit’s ROM chips.
JJOS Operating Systems
The JJOS is a third party MPC operating system made for the MPC1000 and MPC2500 only. It is developed by one of the people behind the original MPC1000 OS (who was allegedly part of the team involved in the MPC2000XL). The original JJOS was primarily the Akai OS with a number of essential bug fixes (most importantly a fix for the disk corruption issues in Akai OS), but a number of additional features were also added such as ‘global program edit’, audio tracks and an improved file management system.
There is also also several paid JJOS versions, which have progressively added more advanced features to these legacy MPCs, although due to the limited ROM memory available in the MPC1000/2500, adding new features often meant that some existing features had to be removed.
Below I’ve included firmware downloads for the various JJOS versions, including the older editions that are no longer developed. Remember you mist use the OS file made for your specific MPC (either MPC1000 or MPC2500). ‘Paid For’ JJOS firmware files are effectively just trials with the save screen disabled (but all other features are fully working) – purchase and enter an activation code to unlock the save screen.
|JJOS Version||Latest OS||Notes|
|JJOS Free||MPC1000, MPC2500||Basically the Akai OS with bug fixes and a few extra features. A no-brainer. Install Guide|
|JJOS1||MPC1000, MPC2500||The original ‘paid for’ JJOS which is structurally similar to the free JJOS but has many additional improvements. No longer available to purchase, but can be freely installed if you have JJOSXL license.|
|JJOS2||MPC1000, MPC2500||This OS involved a massive change to the core structure of the MPC OS and introduced some much more advanced sampling features. From this point onwards, programs created in these newer JJOS versions were not fully -backwards compatible with older JJOS or Akai OS.|
|JJOS2XL||MPC1000, MPC2500||Overhaul of JJOS2 and still my favourite JJOS version which in my opinion contains the best blend of features. Install Guide|
|JJOS128XL||MPC1000, MPC2500||Developed exclusively for the optional ‘large’ screen hardware upgrade that can be purchased from MPC Stuff – this OS will not work in a standard ‘small screen’ MPC. Confusingly, this is NOT the large screen version of JJOSXL. Install Guide|
|JJOS128SP||MPC1000, MPC2500||Large screen version of JJOSXL. Requires a JJOSXL license and the large screen hardware. Install Guide|
|JJOS3||MPC1000, MPC2500||Small screen version of JJOS128XL. Requires a JJOSXL license. Install Guide|
Other Third Party Operating Systems
Roger Linn, original designer of the MPC range currently offers an updated OS for the MPC60. A company called ‘Mansell Labs’ once offered an MPC3000 upgrade called the Vallixi, however that site suddenly (and without any notice or explanation) stopped fulfilling orders for the Valixi chips many years ago. The site is now gone but you can still pick up Vallixi chips on Ebay (some are second hand, others appear to be ‘clones’ of original chips). You can read this forum topic for more information on ‘Vallixi-gate’.