Blog entry

Impressions of IRCAM's FTM 2 MaxMSP extensions

Posted by admin on October 31, 2007

The following are some notes from my experience with installing and testing the FTM 2 beta MaxMSP extension.

# Installation

The package installer did not work right. Help files, object-lists and startup scripts were not copied automatically. I had to put each in the proper place by hand. Ask me if you have problems.

# The new FTM UI objects

Blog entry

A general overview of mathematical completion

Posted by admin on October 26, 2007

The most general principle of mathematical abstraction may be that of completion. Completion merges the domain with the results of some operation. Interesting results with infinite sequential operations are the basis of formal definition for continuous domains such as the real numbers.

Blog entry

Multi-dimensional audio recording

Posted by admin on October 26, 2007

A useful concept is the angular *field of view* (FOV) of a microphone. An omni mic has a field of view that is 0-dimensional. A pair of omnis is a 1d FOV and a planar circular array is 1d embedded in 2d. A planar or cylindrical array has a 2-dimensional FOV. Spherical arrays also have a 2d FOV, embedded in 3d.

Blog entry

Comments on perception of spherical arrays

Posted by admin on October 24, 2007

The array radius defines to a first approximation the maximum displacement radius of the holophonic image. Small arrays are obviously highly localized, however the displacement in position of a beam is perceived at the near and mid field at least.

Blog entry

On the proximity effect and the spherical hankel function

Posted by admin on October 19, 2007

The [w:Proximity effect (audio)|proximity effect] in recording is observed as differences in spectral balance depending on the distance and angle of a microphone with respect to the source being recorded. Especially of note for recording engineers is that the proximity effect can be quite dramatic for at low frequencies when using close microphone placement.