Once you're done, fill it as done previously and average it, but this time either set the blending mode to divide (menu Layers > Division) or keep it to multiply and invert (menu Operations > 1 / x, not to be confused with the other command named invert that instead does 1 - x) the layer. To do so simply draw a curve that follows the approximate shape of the sound's frequency profile curve. Using this visual aid you can go further by designing the equaliser backwards, that is, instead of drawing the correction you want you draw the bias you want to remove. After loading the sound, duplicate it (menu Layers > Duplicate Layer) and turn it into curves (menu Operations > Horizontal Curves) that represent its frequency profile as shown in the image below : You can also use the sound's own frequency profile as a visual reference. Once done drawing the curve, fill it up (menu Operations > Fill from Maxima to Left), average it (menu Operations > Horizontal Average) then finally set the layer's blending mode to multiply (menu Layers > Multiplication).įor best results the use of the lossless mode is recommended. Knowing this and using the editing tools available in the program we can first create an equalisation curve and use it to filter a sound.Ĭreate a new layer (menu Layers > New Layer) then select the White paint spray tool and start drawing a vertical curve, knowing that the left edge of the image represent 0 (complete silencing of that frequency) while the right edge represents the maximum amplification. This works by multiplying the respective intensities in frequency and time of each layer. The use of the lossless mode isn't recommanded when the lossless processing algorithm cannot be expected to give a satisfactory result.įiltering in Photosounder can simply be done by multiplying (menu Layers > Multiplication) two layers together, one of the layers being the sound to be filtered, the other one being the filter. When the use of the lossless mode is recommended it is only when the effect is applied to a loaded sound. Generally the sound on which the effect will be applied will be known as Layer 0, the layers above being created and used to apply the desired effect. The list below details a few ways to reproduce classical audio processing effects using Photosounder's editing tools.
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