Bedienungsanleitung Velodyne DD-12plus (Seite 34 von 42) (Englisch)

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OPTIMIZATION PARAMETERS

Parametric

he following table describes the three parameters of the eight EQ filters that can be adjusted during the optimization process of the

Digital Drive

PLUS

subwoofer. The parametric filters can help you to achieve better room equalization. Although the Auto-EQ

PLUS

and Self-EQ

optimization processes automatically adjust the level of the preset parametric filters, only the Manual-EQ allows adjustment of the frequency

nd bandwidth, as well as level of these filters.

he parametric filters should be adjusted after the system parameters have be set.

During the Manual-EQ process, remember that all of the preset parameters are available for adjustment. At this time, you can customize each

preset to get the appropriate character for use with differing satellites or media depending on your needs and system complexity

EQ Setting Set with Set with Set with

Self-EQ Auto-EQ

LUS

Manual-EQ Description

Frequency (F) No No Yes The center frequency for the parametric filter. The parametric filters

should be placed at peaks and valleys in the frequency response during

Manual-EQ optimization. You should put a filter at the highest peak first

and adjust the filter levels before proceeding to put filters at the next

highest peak. You should put filters at the peaks before putting filters at

valleys. Remember that you are using up amplifier headroom when you

raise a dip, so it is better to lower a peak.

When manually setting the filter frequencies, avoid putting more than

one filter at one frequency. The filters can be close, but if you find that

you need to stack the filters at one frequency, you have probably placed

the subwoofer or microphone in a poor location in the room near or at a

null. To correct for this RESET the subwoofer using the remote, move

the location of the subwoofer or mic and start over with the Auto-EQ

PLUS

optimization and then proceed back into Manual-EQ.

The default parametric filters are at the 1/3 octave ISO frequencies:

20 Hz, 25 Hz, 32 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz and 100 Hz.

Level (L) Yes Yes Yes The filters can be adjusted in level between +6 dB and -13 dB.

The default level is 0 for all filters.

Bandwidth (Q) No No Yes The bandwidth determines how narrow the parametric filter is.

The narrower the filter, the higher the Q value and the faster the roll

off on each side of its center frequency.

The default Q setting for the

bandwidth is 4.3 The Q can be set between 0.1 and 20. The Q or

bandwidth of the filter is usually adjusted last after correctly setting

the frequency and level. It is adjusted so that as little around the dip

or peak being corrected is affected.

[ 31 ]

igital Drive

LUS

ser’s Manual

OPTIMIZATION PARAMETERS

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