Convolution Reverb and Impulse Response
So this may seem a bizarre title unless you have heard a little about it before or found this article through a google search etc... but very simply put Convolution Reverb is the following:
Tracking the reverb of an impulse response in a space and applying the decay and reverb to another audio file to replicate it into a new environment.
Convolution Reverb has lots of benefits such as fitting ADR lines and effects in with production sound recorded on location. I only recently got introduced to the idea of Convolution Reverb as I was in a very noisy location that was due to sound design planning most likely going to be done later in a studio due to the level of control they wanted in post.
To achieve Convolution Reverb properly you need: - Several Balloons - something sharp - recording equipment (obviously)
You simply pop the balloon in the space where the dialogue took place and you can get a fairly accurate map of the reverb and decay. This is then put into a convolution processor and can be applied to new effects and dialogue. This is where you get the name Convolution Reverb.
There are 2 other ways to achieve Convolution Reverb but I find in the field its easier with a balloon. They are:
- Sine wave sweep of the space and calculated together to get an impulse response - Recording white noise at the source and somewhere else in a space which is again mathematically calculated.
I have not seen the results of Convolution Reverb but have given some to post production and await to see the results.
Hope you now understand Convolution Reverb.