As the year continues, many of these posts will be philosophical in nature. Some will be in contradiction to previous postings. These are not intended as truths or assertions, they’re merely thoughts…ideas. Think of this as stream of consciousness over a wide span…
A few weeks ago, I talked about the idea of a sonic version of the “visual zoom.” This past week, I had the realization that there’s a sonic analogue to another camera trick…pulling focus. Quite simply, it’s pulling a fuzzy picture into focus using the lens (or maybe taking it out of focus). Depending on the budget, the camera department on some projects will have a single person dedicated to “pulling focus.”
I can think of two key ways we can emulate this in sound, though there arguably are probably more.
The first is with reverb. Think of the a wide open and very reverberant space, with a single speaker blasting out a spoken announcement. Depending on you location in that space, the reflections may make it impossible to actually interpret what is being said. If you move closer to the source…giving yourself a more distinct time separation between the source and reflections…you’re likely going to have an easier time comprehending what’s being said. The sound is more in focus.
The second way is by applying atypical recording techniques with your microphones, especially with those that have a less-than-flat frequency response as you move off axis. The shift from off-axis to on can increase the clarity of the sound you’re recording. Additionally, you may be adjusting its position to the source in a way that alters the timing of the sound’s arrival at the capsule…adding doppler shift to that change spectrum! Don’t think that’s an interesting sound design technique? Someone people might disagree with you. Watch one application demonstrated here.