Behringer DSP8024 user manual Delay, Equalizer editing, Program administration, a Loading programs

ULTRA-CURVE PRO DSP8024

search means that the audio signal is continuously examined for signs of feedback. If feedback is detected, the ULTRA-CURVE PRO will assign an appropriate filter to the relevant frequency and apply narrow band attenuation, also known as a “notch filter”. The parameters which have been used will be continuously displayed.

The next feedback will be dealt with by the next available filter. When all the filters have been used, and feedback still occurs, the filter used for the first, or oldest frequency will be released to deal with the newest one. If feedback occurs very close to a frequency already being treated, or reappears at a frequency to which a filter has already been applied, the filter already in use will have its parameters changed to deal with the new problem—i. e. the bandwidth will be widened, or the attenuation increased.

In single shot mode (SGL) the filter will not release a setting which has been achieved, this is particularly useful with problems at fixed frequencies like turntable resonances and fixed microphone and monitor positions. If feedback is detected the filter will deal with that frequency and the status of that filter will change to locked (LCK). It will only widen its bandwidth or increase the attenuation but it will not release that frequency to deal with a new feedback frequency. Please note the application example in section 3.2.

2.1.4 Delay

By pressing softkey C / the built in signal delay can be switched on or off. The display shows the current status:

1. = switched off

2. = switched on, signal will be delayed by the preset numerical value.

You can set the delay time in the EQ SETUP menu (see chapter 2.1.6). Among its many uses, it can be used to compensate for time path differences between two sets of loudspeakers set at different distances to the listener. See chapter 3.4 for an application example.

2.1.5 Equalizer editing

By pressing softkey D or by using a cursor key, the function of the softkeys is changed, and this is highlighted by a new set of pictograms. With these, you can access either further sub-menus with their own functions, or carry out important switching functions. We remind you to the function diagrams on the extra sheet. They give you an overview of the way all the menus and sub menus are inserted into one other, in EQ and RTA mode respectively.

Fig. 2.5: EQ EDITING display

You can now enter with softkey A the program administration to store, load and name settings with

softkey B the tools menu, with softkey C / the channel switching (stereolink on), /

the channel switching (stereolink off) and with softkey D / the comparison functions.

Program administration

A program contains the settings for the graphic equalizer, the parametric filters and the delay. Softkey A allows access to further sub menus which are used to organize the program administration:

a) Loading programs

Softkey A : This shows, in the equalizer display, the same information window as shown when operating a fader. However, in contrast to normal equalizer operation, you cannot change the level with the cursor key,

instead you can select a new program. You can confirm this with or cancel it with . In both cases you are then returned back to the EDIT menu.

Using softkey D you can reset all the current ULTRA-CURVE PRO settings—the graphic equalizer, the parametric filters (also in feedback destroyer mode) and the delay—to zero. You will first be presented with the

2. OPERATION 11