Behringer DSP8024 user manual General setup

ULTRA-CURVE PRO DSP8024

more than 12 dB to reach the desired frequency response. If this is the case, you may assume that the loudspeaker system being used is not capable of reproducing this frequency (typically if it is a very low or high frequency). The ULTRA-CURVE PRO will therefore completely avoid the boosting of this frequency to any extent. This will avoid any overloading of the loudspeakers.

Please bear in mind that the test signal passes through the equalizer during the measurement procedure. Therefore, the EQ settings have influence on the manner in which the automatic adjustment takes place. For example: If you lower the level of frequencies below 100 Hz before starting auto-Q, it will result in these frequencies not being adjusted. The level detected by the ULTRA-CURVE PRO in that region will not be sufficient to boost those frequencies. On the other hand, boosting frequencies beforehand can result in them being loud enough to be automatically equalized. This makes sense when they would normally be unaffected by the automatic procedure. You can for instance boost frequencies below 80 Hz or above 10 kHz to extend the frequency range contributing to the measurement. The latter option will put extra strain on the used system but that can be acceptable under certain conditions i. e. when the levels are relatively low and the highest quality sound is required.

The measuring process begins with the automatic levelling. Then you will notice the coloring of the pink noise test signal. This means that the individual EQ-bands are adjusted. When the auto-Q process is finished the ULTRA-CURVE PRO can be set in EQ mode where it automatically displays the achieved EQ setting.

+After using the auto-Q it is well-advised to even out great differences between individual bands to avoid overflow problems. Especially in the low frequency region it is best to have a more gentle flowing frequency response.

+When you want to finish the measuring process prematurely and save the filter setting, press . By pressing the measuring process will be aborted, without changing the original setting.

In the event of the error message “NO SIGNAL DETECTED”, check the measuring microphone. It is possible that the sensitivity is too low. In this case another microphone should be used, or measuring should be carried out over an external preamplifier. The adjusted curve is automatically displayed, you can further edit and save this curve.

It is important to use a high quality reference microphone with a flat frequency response. The BEHRINGER ECM8000 measurement microphone especially designed for this purpose and forms a balanced combination with the ULTRA-CURVE PRO. Correct positioning is also fundamental to achieving a good result. It is often best to perform several measurements on slightly different locations to avoid problems as overcompensating one single position. See chapter 3 for correct microphone positioning.

2.4 General setup

The SETUP menu consists of four windows. Having the EQ or RTA mode active will determine which window is opened on going into SETUP. Pressing the SETUP key for more than two seconds will enter the general setup mode which consists of two windows, the GLOBAL SETUP window and the MIDI SETUP window. These windows contain the basic functions shared by, and affecting both operating modes. The basic configuration will be determined in these windows, which will be referred to as the configuration windows. Pressing the setup key will toggle between page 1 & 2. The other windows can only be reached from here by leaving the SETUP menu by pressing either the EQ or RTA key, and then re-pressing the SETUP key to enter the relevant window.

Fig. 2.10: GLOBAL SETUP menu

The cursor keys are used to select the value or parameter to be changed. The active edit field will be highlighted in reverse color. Changing status or a value can be achieved by use of the / and / softkeys.

INPUT

The input field is used to determine whether the input signal should be derived from the optional digital input, or from the analog input. Furthermore, in analog mode, this is where you can select the sampling rate, 44.1 kHz or 48 kHz. The digital input will automatically synchronize to either 32, 44.1 or 48 kHz. When changing sample

18 2. OPERATION