Deep Hallway
By onezero on July 12, 2014 6:17 pm
For my installation at this year's International Conference on Deep Listening, I adapted a Pure Data patch I'd used before for dynamic live input processing. In this version, two microphone inputs in a hallway were fed into six ring modulators, and then into six pitch shifters. All of the parameters (ring mod mix and carrier frequency, pitch shift, window/chunk size to shift, pre-delay, post delay mix, post delay value, and pan position in quad) were set to randomized values, and each value was updated at a randomized interval. I could set ranges, so global short updates were chaotic, while global long update values were generally more gradual, but allowed short updates. This version also ramps between values, instead of jumping as the previous patch did.
The input here was just two microphones in one hallway of RPI's EMPAC, outside Studio Beta. There's room tone, some voices, some deliberate bumps against a mic, and speaker output going back into the mic inputs. (I tried to ride the gain so that it wouldn't howl, but some feedback was ok.) I did have to filter out a resonance of 165 Hz from the mic signals.
Pauline Oliveros's verdict: "It's fun."
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