MOVE()

MOVE

Moving-source room simulation.

in RTcmix/insts/std/MOVE

quick syntax:

MOVE(outskip, inskip, dur, AMP, dist_between_mikes, rvb_amp[, inputchan])

space(front, right, -back, -left, ceiling, absorb, rvbtime)

path(time0, sound_dist0, sound_angle0, … timeN, sound_distN, sound_angleN)

cpath(time0, sound_x-coord0, sound_y-coord0, … timeN, sound_x-coordN, sound_y-coordN)

param(function1, function2)

cparam(function1, function2)

threshold(update_rate)

mikes(mike_angle, pattern)

mikes_off()

CAPITALIZED parameters are pfield-enabled for table or dynamic control (see the maketable or makeconnection scorefile commands). Parameters after the [bracket] are optional and default to 0 unless otherwise noted.

MOVE employs several subcommands to set the room-simulation characteristics and the sound-source trajectory

NOTE: This is an old RTcmix instrument, the newer MMOVE or DMOVE (pfield-enabled data specification) instruments are better to use.

MOVE

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	output start time	seconds	no	no
p1	input start time	seconds	no	no
p2	duration	or endtime if negative	no	no	(seconds
p3	amplitude multiplier	relative multiplier of input signal	yes	no
p4	distance between ‘mics’	stereo receivers	no	no	in the room (feet
p5	input channel	-	no	yes	default: 0

space

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	distance to front wall of room	feet	no	no
p1	distance to right-hand wall of room	feet	no	no
p2	distance to back wall of room	feet	no	no	< 0.0
p3	distance to left-hand wall of room	feet	no	no	< 0.0
p4	distance to ceiling of room	feet	no	no
p5	wall absorption factor	0-10	no	no	0 == more ‘dead’, 10 == more ‘live’
p6	reverberation time	seconds	no	no	0 - ~5 work best

NOTE: this subcommand is required for MOVE to function

path

The pfields for path are triples:

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	time1	seconds	no	no	point in time at which sound should be at this location
p1	distance1	feet	no	no
p2	angle1	degrees	no	no
p3	time2	seconds	no	no	point in time at which sound should be at this location
p4	distance2	feet	no	no
p5	angle2	degrees	no	no
pN-2	timeN/3	seconds	no	yes	point in time at which sound should be at this location
pN-1	distanceN/3	feet	no	yes
pN	angleN/3	degrees	no	yes

Up to 100 triples may be specified.

NOTE: one of the subcommands (path, cpath, param, cparam) is required for MOVE to function

cpath

The pfields for cpath are triples:

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	time1	seconds	no	no	point in time at which sound should be at this location
p1	xcoord1	feet	no	no
p2	ycoord1	degrees	no	no
p3	time2	seconds	no	no	point in time at which sound should be at this location
p4	xcoord2	feet	no	no
p5	ycoord2	degrees	no	no
pN-2	timeN/3	seconds	no	yes	point in time at which sound should be at this location
pN-1	xcoordN/3	feet	no	yes
pN	ycoordN/3	degrees	no	yes

Up to 100 triples may be specified.

NOTE: one of the subcommands (path, cpath, param, cparam) is required for MOVE to function

param

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	function table reference for polar coordinate distance to sound source	feet	no	no
p1	function table reference for polar coordinate angle to sound source	degrees	no	no

The two function tables are loaded with values representing the polar coordinates of the sound source location (p0 table == distance to sound [feet] and p1 table == angle to sound [degrees]). These values will be spread over the duration of the note

Because this instrument has not been updated for pfield control, the older makegen function table system should be used to create the tables.

NOTE: one of the subcommands (path, cpath, param, cparam) is required for MOVE to function

cparam

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	function table reference for x-coordinate location of sound source	feet	no	no
p1	function table reference for y-coordinate location of sound source	feet	no	no

The two function tables are loaded with values representing the x-coordinate location of the sound source (feet) and the y-coordinate location of the sound source (feet). The listener is assumed to be centered at coordinate [0,0]. These values will be spread over the duration of the note

Because this instrument has not been updated for pfield control, the older makegen function table system should be used to create the tables.

NOTE: one of the subcommands (path, cpath, param, cparam) is required for MOVE to function

threshold

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	time interval	seconds	no	no	for trajectory updates (typically < 0.01

NOTE: this subcommand is optional for MOVE to function (the default is the size of the buffers set in rtsetparams)

mikes

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	microphone angle	degrees, 0 degrees is straight in front	no	no
p1	microphone pattern	0-1; 0 == omnidirectional, 1 == highly directional	no	no

NOTE: this subcommand is optional for MOVE to function (the default is “mikes_off”)

mikes_off

NOTE: this subcommand is optional for MOVE to function

matrix

Param Field	Parameter	Units	Dynamic	Optional	Notes
p0	total matrix gain	relative multiplier of input signal	no	no
p1-p145	12 x 12 matrix amp/feedback coefficients	-	no	yes	defaults to internal matrix

NOTE: this subcommand is optional for MOVE to function

MOVE is Doug Scott’s moving sound simulation instrument, which simulates the acoustic space of a room and lets the user define the trajectory of a sound moving through space within the room, relative to the listener’s position. This is similar to Doug’s other room-simulation program, PLACE, the difference being the ability to specify a moving sound source. MOVE is a bit more computationally expensive than PLACE. The instrument has optional parameters for microphone placement and the computation of inter-aural delays.

NOTE: This is an older RTcmix instrument, the newer MMOVE or DMOVE (pfield-enabled data specification) instruments are probably better to use.

Usage Notes

The use of MOVE is almost identical to the newer MMOVE instrument. See the MMOVE Usage Notes for that instrument (minus the updated subcommands, of course). In fact, it’s probably better to use either MMOVE or DMOVE for doing this processing.

Sample Scores

basic use:

rtinput(“mysound.snd”)

space(50, 50, -750, -80, 25, 1, 3) mikes_off() path(0, 25, 0, 3, 15, 90)

MOVE(0, 0, 5, 20, 0, 1)

MOVE

quick syntax:

Usage Notes

Sample Scores

See Also