User manual
Table Of Contents
- Important Information
- 1 Product Overview
- 2 Installation and Setup
- 3 Acoustic Measurement
- 4 Filter Design
- 5 Using the DDRC-88A audio processor
- 6 Optimizing gain structure
- 7 Additional Information

  PRELIMINARY AND SUBJECT TO CHANGE  
miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice  41 
7.3  MCU FIRMWARE UPGRADE 
miniDSP may periodically provide an update to the DDRC-88A MCU firmware to enable new features. To update 
the MCU firmware, download the latest version of the DDRC-88A configuration plugin from the User Downloads 
section of the miniDSP.com website. Unzip the download and run the installer. Then follow the steps below. 
Note that the firmware upgrade tool is, as of publication of this User Manual, available on Windows only. 
1.  Unplug DC power from the DDRC-88A. 
2.  Connect the DDRC-88A to your PC using the USB cable. 
3.  Press and hold the reset button and plug in the powercord. 
4.  Release reset button. Verify that only Preset 1 LED is blinking and all otherLEDs are off.  
5.  Navigate to the directory C:\Program Files (x86)\miniDSP\DDRC-88A\firmware_tools\Windows and 
run the program PIC32UBL. 
6.  Check the Enable checkbox in the USB pane near the bottom of the window. 










