CICM tools¶

Summary¶

• Description: 1st order Ambisonics rendering for horizontal-only (ambipan~) or spherical loudspeaker setups (ambicube~)
• Manufacturer / Developer: Remi Mignot , Benoit Courribet / CICM Universite Paris Nord
• Version:
• Platform: Pure Data, MaxMSP
• OS: (Linux, MacOS, Vista)
• License: GNU LGPL
• Status of this entry: in progress

Parameter definition¶

Coordinate system convention¶

• what is the underlying coordinate system? -- not described in helpfiles, so this is what I guess:
• cartesian system: mathematical style
• spherical system: mathematical style ( zero to the right handside)
• polar coordinates, order of coordinates: distance, radius, (height)

Parameter describing a sound source¶

• ambipan~ or ambicube render one sound source per external, see screenshot below

ambipan~¶

parameter	description	data format	range	initial state	unit	example	misc
2nd leftmost inlet	x-coordinate	signal or float	?	?	depends on setting
3rd leftmost inlet	y-coordinate	signal or float	?	?	depends on setting
list	coordinate triplet at control rate	float float float	?	?	depends on setting
2nd initial argument	coordinate system	char	"c" cartesian, "p" cylindrical	cartesian		ambicube~ p	can also be changed with message "change_type c" etc.
3rd initial argument	control type of inputs	char	"c" control rate "s" signal rate	control data		ambicube~ p s
5th initial argument	interpolation time for rendering of position messages	?	?	10	ms
mute_sigmuting the sound source	boolean	1, 0			mute_sig 1

ambicube~¶

parameter	description	data format	range	initial state	unit	example	misc
2nd leftmost inlet	x-coordinate	signal or float	?	?	depends on setting
3rd leftmost inlet	y-coordinate	signal or float	?	?	depends on setting
4th leftmost inlet	z-coordinate	signal or float	?	?	depends on setting
list	coordinate triplet at control rate	float float float	?	?	depends on setting
1st initial argument	coordinate system	char	c" cartesian, "p" cylindrical, "s" spherical	cartesian		ambicube~ p	can also be changed with message "change_type c" etc.
2nd initial argument	control type of inputs	char	"c" control rate "s" signal rate	control data		ambicube~ p s
4th initial argument	interpolation time for rendering of position messages	?	?	10	ms
mute_sig	muting the sound source	boolean	1, 0			mute_sig 1

Parameter describing a virtual space¶

• none

Parameter describing the position of loudspeakers¶

• Loudspeaker-positions are fixed in ambicube~
• therefore the following messages are only valid for ambipan~

parameter	description	data format	range	initial state	unit	example	misc
set_nb_hp	number of loudspeakers	int		4		set_nb_hp 5	also 1st initial argument
xy_setpos	description in cartesian	int int int ....				xy_setpos -1 1 1 1
ra_setpos	modification with distance and angle	float float ....				ra_setpos 1 135 1 45 0.7 -45 0.7 -135	order: distance azimuth
a_setpos	azimuthal angle, distance is fixed	int int int ....			degrees	a_setpos 90 0 -90 -180	distance will be set to 1.0

Ambisonics specific parameter¶

parameter	description	data format	range	initial state	unit	example	misc
set_offset	Ambisonics offset	float		0.3	?	set_offset 0.5	can also initialized as initial argument

Projects, sound, and music¶

• art or research projects utilizing this spatial renderer

References¶

• Sedes, A., Courribet, B., and Thiebaut, J. (2003). Egosound, an egocentric interactive and real-time approach of sound space. Proceedings of the DAFX-03, London. [pdf]

External Links¶

• http://cicm.mshparisnord.org/

Media¶