weimerhead

.aa - week two.

This week we looked at a microphone configuration called the Decca Tree, which is used for surround sound recording. Here it is:


example1.mp3 | example2.mp3 | example3.mp3 |example4.mp3 | example5.mp3


(Follow links for audio examples)


When I got together with my fellow music technology associates for a trail of the technique, we used a few different methods. In this first example John Delany walks around the Decca Tree setup playing an acoustic guitar. In the second example we walked around the Decca Tree talking. We then experimented with moving the microphones out from the centre about three metres and spun them around 180 degrees, to face inward. From there, we span John around in a chair in the centre (example three) and then he walked around the perimeter of large Decca Tree (example four). In the final example, we all walked around the space as randomly as possible, again talking.

In each example we wanted to test the depth that could be perceived by the Decca Tree, so we systematically varied the distance the sound source was from the Decca Tree. An example of this is in example two, in which we walked around the Decca Tree progressing toward the center of the mic array.

.sources.

Grice, David 04.03.08, "Multi Micing (2)," Lecture of EMU, Adelaide University.

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