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Institute of Technical Acoustics (ITA)
toolbox
Commits
0ed59c24
Commit
0ed59c24
authored
Sep 28, 2018
by
Dipl.-Ing. Jonas Stienen
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Updating offline simulation parameters
parent
85e3807b
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applications/VirtualAcoustics/VA/itaVA_example_offline_simulation.m
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applications/VirtualAcoustics/VA/itaVA_example_offline_simulation.m
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0ed59c24
%% itaVA offline simulation/auralization example
% Requires VA to run with a virtual audio device that can be triggered by
% the user. Also the rendering module(s) have to be set to record the output
% to hard drive.
buffer_size
=
64
;
sampling_rate
=
44100
;
%% Connect and set up simple scene
va
=
itaVA
(
'localhost'
);
L
=
va
.
create_sound_receiver
(
'itaVA_Listener'
);
va
.
set_sound_receiver_position
(
L
,
[
0
1.7
0
]
)
H
=
va
.
create_directivity
(
'$(DefaultHRIR)'
);
va
.
set_sound_receiver_directivity
(
L
,
H
);
S
=
va
.
create_sound_source
(
'itaVA_Source'
);
X
=
va
.
create_signal_source_buffer_from_file
(
'$(DemoSound)'
);
va
.
set_signal_source_buffer_playback_action
(
X
,
'play'
)
va
.
set_signal_source_buffer_looping
(
X
,
true
);
va
.
set_sound_source_signal_source
(
S
,
X
)
%% Example for a synchronized scene update & audio processing simulation/auralization
timestep
=
buffer_size
/
sampling_rate
;
% here: depends on block size and sample rate
manual_clock
=
0
;
va
.
set_core_clock
(
0
);
spatialstep
=
0.005
;
disp
(
[
'Resulting sound source speed: '
num2str
(
spatialstep
/
timestep
)
' m/s'
]
)
numsteps
=
6000
;
disp
(
[
'Simulation result duration: '
num2str
(
numsteps
*
timestep
)
' s'
]
)
x
=
linspace
(
-
1
,
1
,
numsteps
)
*
60
;
% motion from x = -100m to x = 100m
h
=
waitbar
(
0
,
'Hold on, running auralization'
);
for
n
=
1
:
length
(
x
)
% Modify scene as you please
va
.
set_sound_source_position
(
S
,
[
x
(
n
)
1.7
-
3
]
);
% Increment core clock
manual_clock
=
manual_clock
+
timestep
;
va
.
call_module
(
'manualclock'
,
struct
(
'time'
,
manual_clock
)
);
% Process audio chain by incrementing one block
va
.
call_module
(
'virtualaudiodevice'
,
struct
(
'trigger'
,
true
)
);
waitbar
(
n
/
numsteps
)
end
close
(
h
)
va
.
disconnect
disp
(
'!!! Please stop VA manually to export simulation results from rendering module(s) !!!'
)
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