The term worldizing is a term coined by Walter Murch for a process he developed during the film ‘American Graffiti” in 1973.

This process includes taking a dry recorded sound, voice clip, or any audio recording, and playing it back in a different space where the sound is then re-recorded along with the acoustical characters of that space. This was invented before software allowed for the creation of advanced reverb algorithms to emulate these acoustical properties.

In modern-day film production, the alternative to this is something called ‘Convolution Reverb’, which is a software process that can use an impulse response recording (either a frequency sweep or a loud but quick impulse like a clap) to reverse engineer the acoustical properties of that space, which can then be applied to any sound in post-production.

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