Velodyne Acoustics DIGITAL DRIVEPLUS DD-18+ - Manual (Page 18)

5) When the subwoofer/EQ status line says Synced, start adjusting the subwoofer parameters. Do not attempt to adjust any settings
until the Subwoofer/EQ status line says Synced. Synced means the subwoofer has synchronized its frequency measurement with
the frequency of the sweep tone being played through your audio system. An indication of not being synced is that you raise or lower
a filter slider and the response curve moves at another filter frequency.
6) Click Mute. You can now see the low frequency character of the satellites so that you can make a judgment about this crossover
frequency and slope to properly blend the Digital Drive PLUS subwoofer to them.
7) Click Mute again to restore the subwoofer to playing.
8) Go to the File > Open menu option and open the file that you saved at the end of the Auto-EQ PLUS optimization process. All the settings
shown in the Windows interface are reverted to those arrived at by the Auto-EQ PLUS optimization.
9) Click Save to DD+. Now the Digital Drive PLUS subwoofer has been reset to its state at the end of the Auto-EQ PLUS optimization. You can
save settings to the subwoofer even when the subwoofer is not synced as long it is communicating with the Digital Drive PLUS Windows
Setup Program.
10) Adjust the preset parameters as described in the Making & Saving Changes section.
11) Adjust the parametric filter EQ parameters as described in the Graphs section above.
12) Click Save to DD+ to save the parametric filter settings to the subwoofer’s memory.
13) Click Save to File to save the parametric filter settings and the frequency response curve to a file on your computer.
The frequency response curve is only saved with Manual-EQ, not Self-EQ or Auto-EQ PLUS .
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Digital Drive PLUS User Interface Manual WINDOWS INTERFACE FOR OPTIMIZATION