Quasimidi Rave-O-Lution 309 – Version. 3.00B Firmware Update Eprom [Latest OS]



Brand: Quasimidi

Model: Rave-O-Lution 309



√ 1 x Eprom


1. Open your device

2. Locate your Eprom socket and note the notch orientation.

3. Pull up the Eprom

4. Insert the new eprom with the notch in the same direction as you noted in point 2.

Features and further details

This is firmware update version 3.00B is the latest released operation system by Quasimidi. This operation system update/upgrade requires one eprom chip as revealed in the photos and the chip will be labeled to help you locate the correct chip socket. For more info, please check below.


Revision B was originally provided to buyers who was able to collect their QM-309 at Quasimidi’s headquarter in the past and at same time the buyer would receive a customized firmware with a special start-up message.

Features/improvements from version 2.00 to 3.00 A:

  • Fixed – code issues, which was not addressed in version 2.00
  • Fixed – Random crash / freeze
  • Improved – midi communication / timing

Enhancements from version A to B:

  • Special Welcome message.
  • Improved Song-change management [doesn’t add the crazy special loops drum fills to hide the sync issue, it just switches songs even if it’s not perfect. ]
  • Minor sound output enchancement
  • Revision B is intended to iron out any remaining bugs affecting general stability and improve performance within the firmware code.


  • You may have to make an initialization after updating to newer OS.

░░░░░░▒▒▒▓▓Why buy from MonoTanz?▓▓▒▒▒░░░░░░

⸎ Tested functionality before shipping.

⸎ Free technical support. [English, German and Danish]

⸎ We try to keep our shipping rates as low and transparent as possible with tracking, so you are able to follow your shipment online.

► Summa summārum: We provide a good product with confidence, transparency and honesty, which will improve the functionality of your equipment.


░░░░░░▒▒▒▓▓Important notes:▓▓▒▒▒░░░░░░

⸎ All EPROMs are properly packaged in anti-static material to ensure quality.

⸎ This is firmware on Eprom only, the device itself is not included.

⸎ Backup any data you don’t want to lose before starting. Factory Reset is often required, when you replace the firmware to flush-out data from the old system.

⸎ Please feel free to drop us a message here, per mail or over our Facebook Chat, if you have any problems or questions.


Installation of this part along with any associated risks involved in the process are the responsibility of the buyer. Be sure to back up any data and unplug the unit before installation.