Difference between revisions of "Playing multiple sounds at once"
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Line 105: | Line 105: | ||
= Pygame with Channels = | = Pygame with Channels = | ||
+ | #this is code from the final version of code used to program the Laser Harp. This is saying that if lasers 1 and/or 2 are broken, the wav file associated with that file will be played. | ||
+ | import pygame | ||
+ | pygame.mixer.pre_init() | ||
+ | pygame.mixer.init() | ||
+ | pygame.init() | ||
+ | if(light_level > 800): # state 1 | ||
+ | pygame.mixer.Channel(0).play(pygame.mixer.Sound('/home/pi/laserharp-sounds/1.wav')) | ||
+ | if (light_level2 > 800): # state 2 | ||
+ | pygame.mixer.Channel(1).play(pygame.mixer.Sound('/home/pi/laserharp-sounds/2.wav')) | ||
+ | |||
+ | [https://github.com/ESE205/laser-harp/blob/master/notkms.py Final version of code] | ||
= Link to project = | = Link to project = | ||
[[Laser Harp]] | [[Laser Harp]] |
Revision as of 22:08, 25 April 2019
Contents
Introduction
This tutorial will explain different methods attempted in getting multiple sounds to play concurrently using python.
Steps
- Pick wav files desired to be played.
- Load wav files in code and save it to a variable that can be called later.
- Find a line of code that will play the sound.
- Find a line of code that will allow the sound to be played while different notes are being played at the same time.
Libraries tested
- pydub
- multiprocessing
- multithreading
- swmixer
- pygame
Pydub and Pygame
These two libraries were used in finding the best way to play a sound by itself.
Using pydub:
from pydub import AudioSegment from pydub.playback import play sound = AudioSegment.from_wav('/home/pi/laserharp-sounds/samples/harpSound1.wav') play(sound)
Using pygame:
import pygame pygame.init() pygame.mixer.init() firstSound = pygame.mixer.music('/home/pi/laserharp-sounds/samples/ambi_dark.wav') secondSound = pygame.mixer.music('/home/pi/laserharp-sounds/samples/ambi_choir.wav') firstSound.play() secondSound.play()
Multiprocessing and Multithreading
Using Multiprocessing:
from multiprocessing import Process def play1(): if(lightlevell > 800): s = pygame.mixer.sound.load('/home/pi/laserharp-sounds/1.wav') pygame.mixer.sound.play(-1) def play2(): if(lightlevel2 > 800): s = pygame.mixer.sound.load('/home/pi/laserharp-sounds/2.wav') pygame.mixer.sound.play(-1) processes = [] if __name__=='__main__': processes.append(Process(target = play1)) processes.append(Process(target = play2)) for process in processes: process.start() for process in processes: process.join()
Using Multithreading:
from threading import Thread def play1(): if(lightlevell > 800): s = pygame.mixer.sound.load('/home/pi/laserharp-sounds/1.wav') pygame.mixer.sound.play(-1) def play2(): if(lightlevel2 > 800): s = pygame.mixer.sound.load('/home/pi/laserharp-sounds/2.wav') pygame.mixer.sound.play(-1) threads = [] if __name__=='__main__': threads.append(Thread(target = play1)) threads.append(Thread(target = play2)) for thread in threads: thread.start() for thread in threads: thread.join()
Multithreading with Swmixer
from threading import Thread import swmixer import os swmixer.init(samplerate=44100, chunksize=1024, stereo=False) swmixer.start() def play1(): if(lightlevell > 800): a = swmixer.Sound('/home/pi/laserharp-sounds/1.wav') swmixer.play(-1) def play2(): if(lightlevel2 > 800): a = swmixer.Sound('/home/pi/laserharp-sounds/1.wav') swmixer.play(-1) threads = [] if __name__=='__main__': threads.append(Thread(target = play1)) threads.append(Thread(target = play2)) for thread in threads: thread.start() for thread in threads: thread.join()
If you choose to use Java, this might be a useful link. It shows how to use Threads to play multiple sounds at once. - Java link
Pygame with Channels
#this is code from the final version of code used to program the Laser Harp. This is saying that if lasers 1 and/or 2 are broken, the wav file associated with that file will be played. import pygame pygame.mixer.pre_init() pygame.mixer.init() pygame.init() if(light_level > 800): # state 1 pygame.mixer.Channel(0).play(pygame.mixer.Sound('/home/pi/laserharp-sounds/1.wav')) if (light_level2 > 800): # state 2 pygame.mixer.Channel(1).play(pygame.mixer.Sound('/home/pi/laserharp-sounds/2.wav'))