If you plan to be using it a lot, try and work with aux/bus tracks to get the most out of your CPU. Remember, Convolution Reverb can be a taxing process on your computer’s CPU. Lastly, convolution reverbs are capable of producing an endless amount of long wash reverb tails which make for great scene transitions. Warning: the effects produced can be unpredictable and crazy (but that’s part of the fun!) FutzĪdditionally, you could record an impulse response through any device like your phone, laptop, or car radio speakers and use that to make a target sound seem like it’s playing from that device (a great futz box option, perfect for phone conversations in your next film). This means you could trick the software into using the sound of your dog’s barks, the roar of your car’s engine, your favorite guitar lick, or any other crazy sound you could imagine as an IR. Nowadays, most of these software plugins will accept any old wav/aiff file as an input. Play with it and tweak until you can thoroughly fool the audience. ![]() Dry studio ADR is better than ADR that sounds like it’s been placed in an artificial room. If you plan to do this, remember that less is more. Using convolution reverb to make sounds match the acoustical properties of a space is likely its most common function, proving an invaluable tool for filmmakers to help better match Foley and ADR to the original space. ![]() The late reflections form into what you commonly think of as reverb the tail. Early reflections are the reflections that bounce back to your ear first before the others, and can often have a very pronounced effect on the actual sound as it melds with it more closely. Thousands of them are happening all the time and reverb software simulates those reflections. The software also gives you the ability to control the levels of the early reflections separately from the late reflections (as well as the ability to extend or shorten the length of the reverb), which is very important for tuning the effect properly.įor those of you who don’t understand how reverb works, reverb is the accumulation of all of the sound reflections in a space. Often this can result in a very realistic reproduction of the space. Then all you have to do is throw it on a sound or a track and tweak some of the parameters to your liking. With the impulse response recording in hand, the software does some mathematical wizardry to de-convolve (remove the original sound from) the signal to extract only the wet spatial details that you need. The recording will contain the clap or sweep as well as the spatial reverb effects of that room. ![]() To blend one sound with the acoustic properties of another, the software needs something called an ‘Impulse Response’ (IR), which is a recording of a short, loud sound, like a clap or a generated frequency sweep (from 20Hz-20kHz) taken in the room of choice. This involved taking the target sound and playing it through a speaker in the actual room, re-recording it, then later replacing the original, or mixing it in along with it. Once upon a time, before digital computing power was up to snuff, the only way to make a sound mesh seamlessly with sounds recorded in another space was through a process called ‘worldization’ (invented by Walter Murch on the film American Graffiti). It allows you to take a recording of any space and apply its acoustical properties to any other sound you want. Last Updated on What Is Convolution Reverb?Ĭonvolution Reverb is one of those magical tools that most post-production sound engineers and sound designers rely on.
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