Output Mode
This is where you will select the digital output mode of the DDP. If you have the optional Digital I/O card
installed in your DDP, this page refers to setting the output format of the optional card. You can set the input and
output independently to either AES/EBU or S/PDIF formats. The analog outputs still operate regardless of the set-
tings in this utility. If you see an “Input Error” message, make sure that the appropriate cables are hooked up on
the back of the DDP and that your settings reflect your cable setup.
Digital Input Level Controls
The next utility is digital input level controls. Note that when you are using the analog inputs of the DDP, this util-
ity does not change the level of the signal. When the input is set to AES/EBU or S/PDIF, you may adjust the level
of both the left (channel 1) and right (channel 2) channels of the digital signal. This function is helpful for balanc-
ing and fine tuning the mix of the two channels of digital signal.
MIDI / SysEx
The next set of utilities is MIDI based functionality. In the first parameter line, the DDP displays “MIDI Ch”. This
may be set for channels 1-16, off and OMNI, which is the typical implementation. Communicating with the DDP
through the MIDI language is as easy as in any other MIDI unit: program changes as well as parameter changes
may be activated through the MIDI ports. In addition, the DDP allows you to send and receive “system exclusive”
data and commands on channels other than the MIDI channels, allowing you to perform such complex maneu-
vers as complete system program dumps and reloads, system setups, and output configurations. These are the
SysEx channels. SysEx control is twofold: SysEx channels range from 0-16 and OMNI.
Other MIDI features follow on utility pages 3 through 7. Page 3 of the Utility menu allows you to set the MIDI
and SysEx channels for the DDP. Page 4 allows you to perform MIDI merging. CCs are another good and easy
way of communicating with the DDP. For a complete guide to the full functionality of the MIDI, CC and SysEx
implementation, see section 6. Utility pages 5 and 6 work together and allow you to transfer setups between
DDPs as well as backup to computer, if you have a MIDI interface system. Page 5 will receive any setup name as
any other, and page 6 will let you send setups the same way.
You may also send the entire contents of the DDP, including MIDI information, and parameter settings via Utility
page 7. A bulk dump sends the entire set of programs and setups via the MIDI port.
For complete MIDI / SysEx / CC information see Appendix #4.
A / D Calibration
The last page of utilities is a calibration section for the analog to digital convertor chips. You will notice a set of
more complete instructions displayed in the curve window area. To calibrate the convertors, first turn the input
controls of the DDP fully counter-clockwise (-
∞
) or off. Calibrations performed with these controls open at all
could result in inaccurate calibrations, giving the DDP poor processing performance. After the input controls have
been turned to the OFF position, press the
STORE
button. If the calibration is not successful, the following text
will appear in the third parameter area: “A/D CAL FAIL!” If this happens you should turn the DDP off then back
on. If the problem persists, call dbx technical support at 1-801-568-7660 for assistance.
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Section 5: Utility Functions
