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Table Of Contents
EFFECTS MENU 541
Modulation/Special
Convolution (offline)
The convolution function allows you to produce an inverse average of a sample or object
and another sample.
This involves filtering the original sample with the convolution sample – common overtones
will be amplified, while the rest will be made softer. FFT Analysis Filter offers a similar
method which filters a sample using a frequency sequence of another sample that has
been saved to the clipboard. In this process only the frequency sequences are taken into
account. Convolution, in contrast, links frequency and phase of the material, which leads to
different results when applied to longer samples or objects.
With the convolution algorithm you can create echo and filter effects as well as elaborate
acoustic fusions and exotic morph effects. This function works along the same principles
as the Room Simulator function. However, convolution calculates the exact mathematical
convolution function, whereas the Room Simulator is especially optimized for reverb
calculation.
Convolution sample: Here you can select the project with the convolution signal. If the
convolution signal is longer than 1048576 samples, only the first 1048576 samples with be
used.
Original (%): This parameter allows you to enter the level, in percent, of the original audio
signal that will be mixed with the result of the convolution. A value of 0% signifies that the
edited signal will contain exclusively the result of the convolution function, and a 50% value
will mean that the convolution result will be mixed with the original signal at equal
amplitudes.
Result (dB): With this parameter you can set the volume of the signal resulting from the
convolution function in dB. With values exceeding -10dB, modulations can happen. For
this reason, you should first select lower values.
Convolution – Problems and solutions
After pressing the preview button or the "OK" button the program does not
seem to respond any more.
On slower computers with long impulse responses, the algorithm responds after a certain
amount of time with a status display message of the progress of the calculation as it works
internally on a block by block basis.
The output signal is overmodulated
Reduce the value of the "Results (dB)" parameter.