Pre-delay, also known as the initial delay, is the time interval between the early reflection and the direct sound. Pre-elongation time for rooms of different sizes and sizes is different, but it is mainly related to the size of the room and can have room size. Very close, you can use the average free path of the room to calculate. When the pre-delay of the effect is adjusted to a large value, the large space and the hall effect can be obtained, and at the same time, the sound dyeing caused by the direct interference of the reflected sound to the direct sound can be avoided, but it should not be adjusted too long, and generally should be adjusted. To the extent that the listening space is compatible with the actual space of the room sound and the sound is clear and the sound is strong.
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