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--- en:wiki:anhang:anleitungen:linearisierung_von_frequenzweichen [09/08/2016 22:01] – hamish
+++ en:wiki:anhang:anleitungen:linearisierung_von_frequenzweichen [09/08/2016 22:43] (current) – hamish
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-**This page is not fully translated, yet. Please help completing the translation.** \\
-//(remove this paragraph once the translation is finished)//
 ====== Linearizing digital crossovers ======
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 __At this step we are not trying to correct the influence of the room or speaker placement.__ That will come later.
-We need to use a suitable [[:en:wiki:funktionen:logsweep:logsweep|LogSweep]] covering the frequency range over which we want to linearize the crossover, but with the microphone picking up only the direct sound of the driver, not reflections from the room. It would be ideal to make the measurement in an anechoic chamber, or outdoors in an open field with the speaker pointing upwards and the baffle level with the ground. As it is rarely possible to make such an ideal measurement, we can try to minimize the influence of the room as much as possible. This can be done with the microphone about 30-50cm from the speaker. For high frequencies at that distance the room influence is reduced (and reflections typically have reduced high frequency content).As room influences can never be completely excluded, there is also the possibility, for example of making the measurement directly at the listening position and selecting the values at [[:en:wiki:funktionen:td-functions:frequency_dependent_window|Frequency Dependent Windowing]] wisely (meaning likely small values which will lead to smoothed corrections).
+We need to use a suitable [[:en:wiki:funktionen:logsweep:logsweep|LogSweep]] covering the frequency range over which we want to linearize the crossover, but with the microphone picking up only the direct sound of the driver, not reflections from the room. It would be ideal to make the measurement in an anechoic chamber, or outdoors in an open field with the speaker pointing upwards and the baffle level with the ground. As it is rarely possible to make such an ideal measurement, we can try to minimize the influence of the room as much as possible. This can be done with the microphone about 30-50cm from the speaker. For high frequencies at that distance the room influence is reduced (and reflections typically have reduced high frequency content). As room influences can never be completely excluded, there is also the possibility, for example of making the measurement directly at the listening position and selecting the values at [[:en:wiki:funktionen:td-functions:frequency_dependent_window|Frequency Dependent Windowing]] wisely (meaning likely small values which will lead to smoothed corrections).
 It is hard to make general recommendations as the properties of the sound field in different listening rooms are too complex. Opinions are contradictory as to whether it is helpful to linearize woofers below 200Hz (assuming one doesn't have the option of an anechoic chamber or of burying the speaker outdoors up to the baffle) as it is almost impossible to reduce room influences sufficiently. Therefore it would be expedient for you to try the various options for creating and editing of LogSweeps and observe the result in the changing [[:en:wiki:funktionen:td-functions:iacc_interaural_coherence|IACC]] value and corresponding listening comparisons. Good Luck!
-====\\
+===== Quick Guide: =====
-Quick Guide: ====
 Load [[:en:wiki:anhang:glossar:pulse|pulse response]] in Curve 1\\
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 Save Curve 2 as new XO … ..dbl file
-----
+**Detailed Instructions:** \\
-===== Detailed Instructions:\\
 \\
-{{:bilder_anleitungen:lin_01_origpulse.png?nolink&}}==== =====
+{{:bilder_anleitungen:lin_01_origpulse.png?nolink&}}====
+=====   =====
+=====   =====
+=====   =====
+====   ====
 . First, an impulse response has to be created by above-mentioned methods. Load this in curve. 1
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 {{:bilder_anleitungen:lin_11_normalization.png}}
-. In TD-Functions tab select> Normalization. The curve that should be normalized is No.2, choose individual gain. (Note: In this step it is important to note which crossover type is linearized, since not all crossovers, like the Neville Thiele crossover used in Example are normalized to 0dB. When other types of crossovers are used you may have to normalize to a different maximum amplitude by setting "normalization gain" appropriately (Max value among bins in the data window).\\
+. In TD-Functions tab select> Normalization. The curve that should be normalized is No.2, choose individual gain. (Note: In this step it is important to note which crossover type is linearized, since not all crossovers, like the Neville Thiele crossover used in this example are normalized to 0dB. When other types of crossovers are used you may have to normalize to a different maximum amplitude by setting "normalization gain" appropriately (Max value among bins in the data window).\\
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