ambdec(1) [debian man page]

AMBDEC(1)						      General Commands Manual							 AMBDEC(1)

NAME

       ambdec - Ambisonic decoder for first and second order

SYNOPSIS

       ambdec [options]
       ambdec_cli  config_file

DESCRIPTION

       This manual page documents briefly the ambdec and ambdec_cli commands.

       AmbDec  is  an Ambisonics decoder for up to 36 speakers. It can be used for both horizontal and full 3-D systems of first, second and third
       order.  The decoding matrices are fully user-configurable. AmbDec has some advanced features not found on most decoders:

       Dual frequency band operation.  Optimal Ambisonics reproduction requires a different decoder for low  and  high	frequencies.  This  is	so
       mainly  because	human  perception of sound direction uses different mechanisms at low and high frequencies.  The crossover filters used in
       AmbDec are phase-aligned (the two outputs are exactly in phase at all frequencies). The combined response is equivalent	to  a  first-order
       all-pass network, which is very probably inaudible.

       Speaker	distance compensation.	If the speakers are not all at the same distance to the center of the listening area, this must be compen-
       sated by including the right delays and gain corrections.

       Near-field effect compensation.	Ambisonics works by reconstructing the spherical harmonic components of a sound field at the center of the
       listening  area,  using	all  speakers  to synthesize each of them. All non-zero order components show a near-field effect depending on the
       ratio wavelength=distance, and increasing for rising order. One example of this is the well known 'proximity effect' of directional  micro-
       phones  ('directional' is equivalent to 'using non-zero order components'). Except in very large installations, where the speaker distances
       will be large enough so the listening area is not in the near field, this effect must be compensated for  in  order  to	obtain	a  correct
       reconstruction of a sound field.

OPTIONS

       ambdec accepts the following command line options:

       -h     Show summary of options.

       -c FILE
	      Load configuration from FILE.

       -p PATH
	      Load presets from PATH.

       -V VOLUME
	      Set initial volume in dB.

AUTHOR

       ambdec was written by Fons Adriaensen <fons@kokkinizita.net>.

       This manual page was written by Alessio Treglia <quadrispro@ubuntu.com>, for the Debian project (and may be used by others).

								    2010/03/14								 AMBDEC(1)

Check Out this Related Man Page

LINSMITH(1)						      General Commands Manual						       LINSMITH(1)

NAME

       linsmith - Smith charting program, designed for educational use.

SYNOPSIS

       linsmith  [-d opts]

DESCRIPTION

       This  manual  page  briefly documents linsmith.	It was written for the Debian GNU/Linux distribution because the original program does not
       have a manual page.  A more complete manual is included (in PDF form) with the installation.

       linSmith is a Smith Charting program, mainly designed for educational use.  As such, there is an emphasis on capabilities that improve  the
       'showing the effect of'-style of operation.

       It's main features are:
	* Definition of multiple load impedances (at different frequencies)
	* Addition of discrete (L, C, parallel and series LC, and transformer) and line components (open and closed stubs, line segments)
	* Connection in series and parallel
	* Easy experimentation with values using scrollbars
	* A 'virtual' component switches from impedance to admittance to help explaining (or understanding) parallel components
	* The chart works in real impedances (not normalized ones)
	* Direct view of the result on the screen
	* Ability to generate publication quality Postscript output
	* A 'log' file with textual results at each intermediate step
	* Load and circuit configuration is stored separately, permitting several solutions without re-defining the other

OPTIONS

       This program is mainly designed for graphical use, and therefore does not have many options. A summary of options is included below.

       -h, -? Show summary of options.

       -d items
	      Enables debugging.  Possible debugging items:
	      l - loads
	      e - elements
	      g - graphics
	      p - printing
	      m - math
	      o - logging

AUTHOR

       linsmith was written by John Coppens.

       This  manual  page  was written by Margarita Manterola <debian@marga.com.ar>, for the Debian project, and is licensed under the GNU General
       Public License.

Linsmith							   November 2005						       LINSMITH(1)

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ambdec(1) [debian man page]

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