atk-sc3/Classes (extension)
| Libraries > Ambisonic Toolkit > UGens > FOA > Transformer | UGens > Multichannel > Ambisonics
FoaProximity
Extension
ExtensionFirst Order Ambisonic (FOA) proximity effect filter
Description
Apply proximity filtering to a First Order Ambisonic signal (B-format).
Class Methods
.ar
Arguments:
| in |
The B-format signal, an array: [w, x, y, z] |
| distance |
The distance, in meters. WARNING: Distance = 0 is an invalid value! |
| mul |
Output will be multiplied by this value. |
| add |
This value will be added to the output. |
Discussion:
FoaProximity facilitates the introduction of the proximity effect to encoded signals. At extremes, the proximity effect introduces a strong bass boost, as well as phase differences. The proximity effect can be an important contributor to perceptions of nearness.
The Ambisonic Toolkit's near-field compensation filter, FoaNFC, undoes FoaProximity given the same distance argument.
WARNING: As FoaProximity includes a 1st-order integration, signals must be highpass filtered before application. HPF is usually a suitable choice to control low frequency boost.
Examples
Please see this.