How the heck does convolution reverb work? In the demo video below, listen to how the sound of a guitar changes as different convolution reverb settings are applied, like a cinema room, a hillside, and a redwood forest: (Placing them on sends can help avoid slowdowns.) Depending on the plugin and the strength of your computer, you may not be able to run too many instances at once. A commonly cited downside to convolution reverbs is that they can be CPU-hungry. It’s also good for when you need to add a barely-there “invisible” reverb. This can be especially important in film and video game scoring. There are some vanity reasons why this is cool - you can replicate the sonic qualities from a famous recording studio, for example - but there can be practical reasons to pick a convolution reverb.īecause convolution reverb uses recordings from real locations, it’s great when you need to replicate a believable space. Then, you get to apply that recorded reverb to your audio. Someone literally goes out into the world and captures the sonic qualities of a space by making a sound and recording the reverberations that happen afterward. On the other hand, convolution reverbs use high-quality recordings from actual physical spaces. Many of the algorithms used in these plugins take inspiration from real places. Algorithmic reverbs use mathematical formulas to simulate rooms with different sizes and qualities. What is convolution reverb?ĭigital reverbs typically come in two categories: algorithmic and convolution. So, the shape, size, and materials in a space all affect how a sound lingers in the air after it goes into the atmosphere.īecause every nook and cranny affects the sonic characteristics of a space, reverb can transport a listener to an entirely different place, like a cathedral, an arena, or a small and cozy studio. That’s because reverb is made by a sound bouncing off of surfaces until it eventually disappears. There’s a difference when you hear sounds in your bedroom versus an old stone church, right? In one space, a sound goes away quickly and in the other, it hangs around in the air and feels bigger. Even if you don’t know the technicalities behind how reverb is created, you know what it sounds like. Reverb is an important effect in bringing sounds to life.
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