HoaDecodeMatrix : HoaRenderMatrix : HoaUGen : Object

Extension

Description

Decode (render) a Higher Order Ambisonic signal (HOA) via an HoaMatrixDecoder.

Class Methods

HoaDecodeMatrix.ar(in, hoaMatrix)

Inherited class methods

Instance Methods

Inherited instance methods

Examples

Decode single beam

This example is equivalent to decoding via HoaDecodeDirection, where radius = AtkHoa.refRadius.

Encode six sinusoids on the axes, then decode a single beam.// simple test... // boot rt server s.boot; // choose Ambisonic order ~order = 1 ~order = 2 ~order = 3 // choose an outbus, if need be ~outbus = 0 // open scope s.scope(1, ~outbus); // design encoding matrix ~directions = [ [0.0, 0.0], [90.0, 0.0], [180.0, 0.0], [-90.0, 0.0], [0.0, 90.0], [0.0, -90.0], ].degrad; ~matrixEncoder = HoaMatrixEncoder.newDirections(~directions, order: ~order); // design decoding matrix ~theta = 0.0; ~phi = 0.0; ~matrixDecoder = HoaMatrixDecoder.newDirection(~theta, ~phi, order: ~order); // freqs ~freqs = Array.series(~directions.size, 110.0, 110.0); ~amps = Array.series(~directions.size, 1, 1).reciprocal; // audition ( { var gain = -18; var sig, hoa; sig = SinOsc.ar(~freqs, mul: gain.dbamp * ~amps); hoa = HoaEncodeMatrix.ar(sig, ~matrixEncoder); HoaDecodeMatrix.ar(hoa, ~matrixDecoder); }.play(outbus: ~outbus) ) // quit rt server s.quit

Decode multiple beams

This example is equivalent to decoding via HoaDecodeDirection, where radius = AtkHoa.refRadius.

Encode six sinusoids on the axes, then decode six beams.// simple test... // boot rt server s.boot; // choose Ambisonic order ~order = 1 ~order = 2 ~order = 3 // choose an outbus, if need be ~outbus = 0 // open scope s.scope(6, ~outbus); // design encoding matrix ~directions = [ [0.0, 0.0], [90.0, 0.0], [180.0, 0.0], [-90.0, 0.0], [0.0, 90.0], [0.0, -90.0], ].degrad; ~matrixEncoder = HoaMatrixEncoder.newDirections(~directions, order: ~order); // design decoding matrix ~matrixDecoder = HoaMatrixDecoder.newDirections(~directions, order: ~order); // freqs ~freqs = Array.series(~directions.size, 110.0, 110.0); ~amps = Array.series(~directions.size, 1, 1).reciprocal; // audition ( { var gain = -18; var sig, hoa; sig = SinOsc.ar(~freqs, mul: gain.dbamp * ~amps); hoa = HoaEncodeMatrix.ar(sig, ~matrixEncoder); HoaDecodeMatrix.ar(hoa, ~matrixDecoder); }.play(outbus: ~outbus) ) // quit rt server s.quit