HoaDecodeMatrix

Extension

Description

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

Class Methods

.ar

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