AN3340

Loudspeaker compensation

Doc ID 18453 Rev 1

17/24

Manual reshaping

The automatic procedure described above can be complemented with a manual adjustment

of the PEQs position to add a special shape to the response, if desired. This possibility is

very useful for enhancing the voice or adding music equalization, for instance.

On the equalizer panel, place the cursor on a single PEQ to modify, locally, its position.

Figure 16 shows the frequency response achieved by starting from the flat response shown

in Figure 14 and applying a manual modification to biquads 1, 3 and 4 to enhance the

response in the frequency range 900 Hz to 8 kHz.

Figure 16.

AWP - speaker compensation (4 biquads) with manual modification

Manual compensation

Speaker compensation can also be performed manually. The procedure requires the

interaction between the user and the tool to achieve the final result and it is obviously related

to the user competence to properly manage the position of each PEQ.

It is necessary to import the original frequency response of the speaker, to select the

frequency range of where to apply the compensation and to select the number of biquads.

Positioning the mouse on the equalization graph on a positive or negative area changes its

shape from a cross to a magic wand. Then, clicking the left mouse button, a biquad is

selected to compensate that portion of the response. The procedure can be applied for each

positive (red) and/or negative (green) portion of the frequency response. The user decides

where to apply the compensation and he is responsible for selecting only positive or only

negative areas or both.