Mixing engineers do this to help prevent the bass guitar masking the kick drum in the mix. Mixing engineers often use sidechain compression to turn down a bass guitar whenever a kick drum is played. To understand why this technique is useful, it helps to look at an example of its application. So now, the sidechain analyses a different signal and instructs the compressor to apply compression based on that which is occurring on a different track. But many compressors offer you the option to feed the compressor’s sidechain with a different signal. So, put very simply, your compressor’s sidechain tells your compressor when to turn the signal down.īy default, the sidechain is fed with a copy of the native signal i.e the signal from the track that the compressor is inserted on.
The gain controller then turns the signal down in accordance with the ratio setting. When the sidechain circuit calculates that compression is required, it instructs the gain controller to turn down the level of the signal that is flowing through the compressor.
It makes this determination by measuring its copy of the signal against the compressor’s threshold setting. The sidechain circuit analyses this copy of the signal to determine when the signal requires compression. Upon entering the compressor, a copy of the signal is fed to the compressor’s sidechain circuit. The gain controller is the device that turns down the level of the signal that is passing through the compressor whenever compression is required. The signal then passes through the compressor and leaves the compressor via the output. When you insert a compressor onto a track, the track’s signal enters the compressor through the input. To understand sidechain compression, it helps to first understand how a compressor works. Or you can have a compressor attenuate the level of a guitar every time the vocalist sings. For instance, you can have a compressor apply compression to the bass guitar every time the kick drum is played. That’s because it opens up the option to compress a track in your mix in relation to what is happening on a different track. Sidechain compression can be a really useful technique in mixing.
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