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  • Correlation, when using S1 and Altiverb positioning together for panning

    I don´t know much about correlation, but as far as I´m concerned, it is not good, if I get a negative correlation amount in Logics Multimeter. . I remember, that Miklos proposed, to use a combination of waves S1 an Altiverb stage positioning for panning. But when I try this, I get a negativ correlation, as soon as I move the speakers in altiverb just slightly to one side, while using S1 at the same time. . E.g.: My HO-4_sus use a S1, set to Rotation: -16,0, Asymetry: 2 and width: 0.37. Without Altiverb speakers beeing moved left, correlation is fine, but as soon, as I just slightly move the speakers left, the correlation meter gets to the red (negative) zone. .Is that a problem? (I´ve tested a John Williams song, which almost never gets negative correlation.) If yes, how do I solve this? Should I use just one plugin for panning?

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    Hi Felix

    Phase shifts are normal between the two channels - That makes the stereo-effect.

    But they can become a value which is so big that you have frequency deletes - specially

    while switching the two channels to a mono signal.

    The signal seems to sound weak and/or strange.

    Theory:

    When the signals in both channels do have the same course the phase shift value is 0°.
    The correlation meter shows +1.

    For the situation where the signals are 90° shifted the correlation meter shows the value 0.

    If the signals are shifted with an angle of 180°, the Left channel does the opposite of the right channel.
    The correlation meter shows -1.

    It is true that Altiverb can produce such -correlation values.

    But there are two good solutions which are easy to practice (together with Altiverb):

    1. If you have a correlation between -1 and 0 use the possibility to turne the phase of your host program.

    Perhaps you don't have the possibility. There are VST-effects which can do this job.

    As an example for WIN and MAC: http://www.sonalksis.com/index.php?section_id=99 (Flip ø)

    2. Use the possibility "shifting the speakers" in Altiverb. Sometimes it only needs a little shove (some 1/10 mm

    with the speakers) and the -correlation changes its value to a positive average.

    Let me advertise my "helpers": This theme and much more are explained/handled in my tutorials..Step9. [:$]

    All the best

    Beat Kaufmann


    - Tips & Tricks while using Samples of VSL.. see at: https://www.beat-kaufmann.com/vitutorials/ - Tutorial "Mixing an Orchestra": https://www.beat-kaufmann.com/mixing-an-orchestra/
  • Hi Beat, thanks a lot! Specially moving the altiverb speakers slightly, helped a lot. Is a little bit of negative correlation o.k.? On some patches, there´s only a few notes, having a negative value, while the rest is at about + 0,5.

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    @Felix Bartelt said:

    Hi Beat, thanks a lot! Specially moving the altiverb speakers slightly, helped a lot. Is a little bit of negative correlation o.k.? On some patches, there´s only a few notes, having a negative value, while the rest is at about + 0,5.
     

    Hi Felix

    With stereo signals but also with convolution reverbs it' is a normal thing. Important is that the average is on the + side.

    The more the better - but a nice natural stereo width involves "minus correlations" from time to time.  [:)]

    I'm happy that my upper post helped a bit.

    Beat 


    - Tips & Tricks while using Samples of VSL.. see at: https://www.beat-kaufmann.com/vitutorials/ - Tutorial "Mixing an Orchestra": https://www.beat-kaufmann.com/mixing-an-orchestra/