Sound Demo#
sound_demo.py#
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Sound Panning Demo
If Python and Arcade are installed, this example can be run from the
command line with:
python -m arcade.examples.sound_demo
Each button plays a sound when clicked.
The top left button plays a streaming music track when pressed. If you
click it while it's already playing, it will intentionally crash the
demo to demonstrate how you shouldn't try to play a streaming sound
that's already playing.
The lower 3 rows of buttons play a non-streaming (static) sound with
different panning and volume. Going from left to right changes the
panning, which is how much the sound plays in the left speaker vs the
right speaker. Lower rows play the sound louder than the higher ones.
"""
import typing
import arcade
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Sound Panning Demo"
BUTTON_SIZE = 30
SOUND_PANNING = [-1.0, -0.5, 0.0, 0.5, 1.0]
BUTTON_X_POSITIONS = [
BUTTON_SIZE,
SCREEN_WIDTH / 4,
SCREEN_WIDTH / 2,
SCREEN_WIDTH / 4 * 3,
SCREEN_WIDTH - BUTTON_SIZE,
]
VOLUME_VARIATION = [0.1, 0.5, 1]
Y_OFFSETS = [50, 0, -50]
class SoundButton(arcade.SpriteSolidColor):
"""
A sprite that stores settings about how to play a sound.
This class can load a sound as either a static sound or a streaming
sound. Streaming should be used for long files that will only have
one instance playing, such as music or ambiance tracks.
If you try to play a sound created with streaming=True while it is
already playing, it will raise an exception! Non-streaming (static)
sounds are fine with it, and can have play() called on them as many
times as you want.
"""
def __init__(
self,
sound_file,
pan=0.5,
volume=0.5,
center_x=0,
center_y=0,
streaming=False
):
super().__init__(BUTTON_SIZE, BUTTON_SIZE, arcade.color.WHITE)
self.sound = arcade.Sound(sound_file, streaming=streaming)
self.pan = pan
self.volume = volume
self.center_x = center_x
self.center_y = center_y
def play(self):
self.sound.play(pan=self.pan, volume=self.volume)
class MyGame(arcade.Window):
def __init__(self, width, height, title):
super().__init__(width, height, title)
arcade.set_background_color(arcade.color.AMAZON)
self.button_sprites = None
def setup(self):
self.button_sprites = arcade.SpriteList()
# create the streaming button at the top left
self.button_sprites.append(
SoundButton(
":resources:music/funkyrobot.mp3",
pan=-1.0,
volume=0.1,
center_x=BUTTON_SIZE,
center_y=SCREEN_HEIGHT / 2 + 150,
streaming=True
)
)
# Position the grid of buttons
# The zip function takes pieces from iterables and returns them
# as tuples. For more information, see the python doc:
# https://docs.python.org/3/library/functions.html#zip
for vol, y_offset in zip(VOLUME_VARIATION, Y_OFFSETS):
for pan_setting, x_pos in zip(SOUND_PANNING, BUTTON_X_POSITIONS):
self.button_sprites.append(
SoundButton(
":resources:sounds/upgrade4.wav",
pan_setting,
vol,
x_pos,
SCREEN_HEIGHT / 2 + y_offset,
)
)
def on_draw(self):
self.clear()
self.button_sprites.draw()
def on_update(self, delta_time):
self.button_sprites.update()
def on_mouse_press(self, x, y, button, key_modifiers):
hit_sprites = arcade.get_sprites_at_point((x, y), self.button_sprites)
for sprite in hit_sprites:
button_sprite = typing.cast(SoundButton, sprite)
if button == arcade.MOUSE_BUTTON_LEFT:
button_sprite.play()
def main():
game = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
game.setup()
arcade.run()
if __name__ == "__main__":
main()
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