3-dimensional sound (3D sound) is a type of manipulation of audio output to give the illusion that sound is coming from different directions. It has become possible in Scratch 3.0 due to new Sound blocks, mainly set [ v] effect to ()::sound
and change [ v] effect by ()::sound
.
This technique is only effective on devices using stereo speakers, headphones, or earphones. It will not have the desired effect on monophone speakers.
Scripts
To make 3-dimensional sound, create the following scripts in the sprite that will play the sound, with "listener" representing the sprite in the position that the person hearing the sound would be in:
when gf clicked repeat until <(playing sound) = [0]> play sound (sound v) until done end stop all sounds when gf clicked repeat until <(playing sound) = [0]> set volume to ((200) - (distance to (listener v))) set [pan left/right v] effect to ((x position) - ([x position v] of (listener v))) end
If the sound has to repeat infinitely instead of the script repeating until something happens, the repeat until blocks should be changed to forever blocks:
when gf clicked forever play sound (sound v) until done end when gf clicked forever set volume to ((200) - (distance to (listener v))) set [pan left/right v] effect to ((x position) - ([x position v] of (listener v))) end
See Also
- Stereophonic sound#Playback on Wikipedia