OD-11 user guide in english May 16, 2019 12:59 Updated Click here to get to the OD-11 user guide in english. Related articles OD-11, how to update the software? what does the function button do? OD-11 - how loud can i play on it? how do i setup OD-11 for the first time? i purchased my unit from a retailer, who do i contact?