Blog entry

Growth Trend in Channel Count of Spatial Audio Systems

Posted by admin on October 11, 2010

Ader, théâtrophone, 1881, 2 loudspeakers (binaural)
Luigi Russolo, The Art of Noise, 1913, ~12 loudspeakers
Disney, Fantasound, 1940, 54 loudspeakers
Xenakis/Varese, Brussels World Fair, 1958, 425 loudspeakers
TU Berlin WFS, 2000 (est), 2700 loudspeakers

Blog entry

Dodec Speaker Simulation

Posted by admin on October 1, 2010

This is from a fast-multipole boundary element method sound-hard acoustic simulation of the CNMAT 12-sided dodecahedral loudspeaker.

Geometry, ~3000 triangles. Active speaker is green pointing towards +X axis.

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Bubble plot, linear amplitude of response on a sphere at 2 meters, 1khz.

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XY planar slice, contour lines are -6db steps.

Blog entry

Maxlib and other topics

Posted by admin on September 27, 2010

Maxlib:

- Conventions
- literate naming
- symmetric operations
- minimal dependencies
- Control Extras
- delay.minutes
- nop and nop~
- route.test
- List operations
- iteration: each, map, reduce
- operations: sort, interleave, min, max, length, partition, range, take, union, ...
- Audiometrics
- db.to-amp, hz.to-oct
- spl
- dithering
- Auditory

Blog entry

Spherical Directivity Resonance Synthesis, Movies (3/3)

Posted by admin on August 10, 2010

These movies are animations demonstrating the method of dynamic synthesis of a directivity function in spherical coordinates, as described in [cnmat:node/9296|this paper].

This movie shows the scattering-resonance operator starting from a directional dirac (beam).

Blog entry

Spherical Directivity Resonance Synthesis, Movies (2/3)

Posted by admin on August 10, 2010

These movies are animations demonstrating the method of dynamic synthesis of a directivity function in spherical coordinates, as described in [cnmat:node/9296|this paper].

This movie shows the scattering-resonance operator starting from a directional dirac (beam).

Blog entry

Spherical Directivity Resonance Synthesis, Movies (1/3)

Posted by admin on July 22, 2010

These movies are animations demonstrating the method of dynamic synthesis of a directivity function in spherical coordinates, as described in [cnmat:node/9296|this paper].

This movie shows the scattering-resonance operator starting from random initial conditions.

Blog entry

Livid Block with micro-OSC

Posted by admin on November 11, 2009

I am working on getting micro-OSC to run on the PIC processor that powers the new Livid Block controller.

This isn't a PIC that I've worked with before but we anticipate no significant problems. The Livid Block has a USB-MIDI interface out of the box.

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Blog entry

Buchla "Thunder" 222e Surface with micro-OSC

Posted by admin on November 11, 2009

I am working on embedding micro-OSC into the Buchla 222e control surface. This is a capacitive many touch surface with a layout identical to the classic Buchla Thunder.

- Sampling rate is 100hz.
- The ADC bit depth is 12-bit at the converter, about 9 bits are typically reported.
- The TTL serial rate is 188kbps with 3.3v signaling.

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