Acourate-Wiki

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== Signal Rotation ======

{{:bilder_funktionen:td_rotation.png?nolink&}}

**Description:** \\
Moves a signal earlier in time (negative) or later (positive) by the given number of whole samples.

\\
**Use:** \\
This function can shift time domain signals so they can be better compared visually. Alternatively, it can be used to [[:en:wiki:anhang:glossar:phasenkorrektur|Time-align]] digital crossovers.

\\
**Example:** \\
\\
{{:bilder_funktionen:funkt_bsp_rotation_01.png?nolink&}}\\
This example is a 3-way Neville Thiele crossover. Use Generate > [[:en:wiki:funktionen:generate:crossover|Crossover]] to create them and look at their behavior in the time domain below:\\
\\
{{:bilder_funktionen:funkt_bsp_rotation_02.png?nolink&}}

Zoms in to the peaks in the time window: they all lie exactly above one another. If the peaks are marked with the left and right mouse buttons ....\\
{{:bilder_funktionen:funkt_bsp_rotation_03.png?nolink&}}\\
... You can see in the window on the right that the peak is at the exact time center of the filter. (Filter length 65536/2 = 32768) Depending on the curve selected by the radio buttons the position of the peak of the filter in the time domain can be seen.\\
{{:bilder_funktionen:funkt_bsp_rotation_04.png?nolink&}}\\
Now Choose e.g. the tweeter, (XO3) ... and "pushes" it with Signal Rotation in time +4 samples later. (1 sample at 48kHz = 3.57mm at the speed of sound in air)\\
\\
{{:bilder_funktionen:funkt_bsp_rotation_05.png?nolink&}}

To check, the sample number of the peak can be read next to the time-window.