By setting interaction > rotation to auto the Carousel will always rotate at the same speed (interaction > speed), disregarding the mouse and keyboard. I suggest you to set interaction > view_point to none and to set interaction > default_view_point as you like it.
In the following example speed is set to 25 and default_view_point to 50%.
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Combining the automatic rotation with options for margin control you can obtain a nice square banner.
In this example images are 128×128 pixel in a 160×160 Carousel. I set negative left and right margins in order to allow the Carousel to overflow its area on both sides. I also set the vertical ratio to 100% to avoid images to be scaled down. Far images are scaled down to 0% of their height and fade to 0% (they completely disappear). I also enhanced the reflection (alpha 75%) and raised it a bit (20 pixel up).
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Enjoy my Carousel, Saverio.