Hoa.library v1.3.1 for Max

Hoa library as a suite of objects and patchs for Max software.

Important : If you have already install the previous version of the library, you should uninstall this version before the installation of the new version. The version 1.3.1 is compatible 32 and 64 bits.

Download.

Feedback and comments are welcome. Contacts.

All sources codes are available on the HoaLibrary Github repository.

Objects :

• hoa.encoder~ encodes a signal in the circular harmonics domain depending on an order of decomposition and an angle.
• hoa.decoder~ decodes an ambisonic sound field for several loudspeakers configurations or for headphones. (eg. ambisonic | binaural | 5.1 | stereo ..)
• hoa.rotate~ applies a rotation on the ambisonic sound field.
• hoa.plug~ helps the modularization of patches for ambisonic processings.
• hoa.connect helps to connect the hoa externals together.
• hoa.dac~ makes easier the setting of the channels. It works like a dac~ object but you can use the matlab syntax to set the loudspeakers routing.
• hoa.pi is for people that never remember more than 4 decimals or want to initialize a good Pi number.
• hoa.pi~ is a signal version of the hoa.pi object
• hoa.scope~ displays the harmonics of an ambisonic sound field on a circle.
• hoa.projector~ discretizes the ambisonic sound field into an array of virtual microphones.
• hoa.recomposer~ recomposes a plane wave decomposition into circular harmonics and applies sound field transformations.
• hoa.recomposer is a GUI to manipulate virtual microphones and control sound field transformations.
• hoa.meter~ displays the peak levels for a circular array of loudspeakers. It computes and displays the energy and velocity vectors.
• hoa.gain~ is a GUI to control a multichannel gain
• hoa.record~ creates a sfrecord~ object with the best arguments to record of an ambisonic sound field.
• hoa.play~ creates an sfplay~ object with the best arguments to play of an ambisonic sound field.
• hoa.optim~ applies optimizations to the circular harmonics.
• hoa.map allows you to spatialize several sources on a plane.
• hoa.map~ is a tool that encodes several sources in the circular harmonics domain. It's easy to use and works with hoa.map.
• hoa.convolve~ uses time domain and frequency domain filtering to apply reveberation on harmonics dependant signals. The zero latency convolution is optimized with an algorithm based on the Gardner's one.
• hoa.wider~ can be used to wide the diffusion of a localised sound. The order depending signals are weighted and appear in a logarithmic way to have linear changes.
• hoa.freeverb~ is based on Schroeder/Moorer reverberation model that uses eight parallel comb filters and four cascaded allpass filters adapted to ambisonic domain.
• hoa.space allows you to draw spatial filtering and apply gains to the virtual microphones signals. It sould be used with the hoa.space~ object in the plane wave domain.
• hoa.space~ applies gains to the virtual microphones signal.
• hoa.vector~ displays the coordinates of the velocity vector and the energy vector that characterize a sound field. It's an useful tool to analyse restitution quality.

Patchs :

• hoa.am~ creates a diffuse soundfield by modulating the amplitude of the circular harmonics signals.
• hoa.delay~ allows you to delay the differents harmonics.
• hoa.decorrelation~ allows you to delay the differents harmonics depending on the harmonic number to decorrelate the harmonics and generate a diffuse sound field.
• hoa.grain~ synthesizes a diffuse sound field. It uses delay lines and amplitude modulation to create streams of grains. The parameters are scaled depending to the orders to generate a granular sound field.
• hoa.mirror~ applies a weight on the negatives harmonics to add the mirror image of a sound field to itself.
• hoa.mixer~ helps to understand ambisonics and the behavior of the circular harmonics.
• hoa.granular~ synthesizes a diffuse sound field. It uses delay lines and amplitude modulation to create streams of grains. The parameters are scaled depending on the orders to generate a granular sound field.