I would like to know how I can start an audio without having to enter the Pyglet loop. My question is based on the fact that I'm already using a loop, for Pygame. Unfortunately, with the latter, I found the fact that it has an inaccurate control with regard to the volume of the audio. So I wanted to use Pyglet to play it. The fact is that I can not allow myself to start a loop with Pyglet, because it blocks the script, so, returning to the question, how can I use the audio playback event independently?
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First I want to explain what does this little program is supposed to do. It is a musical looper, when not recording anything, it will basically bypass the incoming audio blocks to the output. When in recording mode (which is triggered by a button in tkinter gui) it will still bypass the input to the output, but it will also record incoming audio. When the recording is done, it will loop the recording. This is basically it.
The program consists of 3 files: https://gist.github.com/ramazanemreosmanoglu/ec64f51f101d9324612bcbcc597fabba
So this is what happens when I run the program:
(Nothing is played automatically in the video. When I record something and do nothing, nothing happens. At first, I thought I should add a midi monitor but we don't need it, just know that every sound is triggered by me.)
https://www.youtube.com/watch?v=PdBORfjHAgQ
What is wrong in this code? What is the correct way to record audio blocks on python with jack?
I am writing a bit of python code that plays a sound file (MP3 or the equivalent) and should cut that sound off if the user strikes a (hardware) button that is wired into the system. This will be on a Raspberry Pi running Raspbian. The libraries I’ve used historically for playing sound all play to completion. The closest approach I can think of would be using an external sound player (OMXplayer perhaps) and then searching for and killing its process if the button is pressed, but this feels inelegant. Can anybody suggest a better approach?
Using Pyaudio you could simply check a flag before writing each buffer to the stream, and if the audio should stop, fade out the current buffer and then either continue the stream with silence (write 0's) or stop the stream and exit the program. This could be easily be achieved with a latency of ~1/10s after button press.
You would also need to create a UI thread in the application to handle commands since the stopping flag is switched on user input.
Ok so basically I'm working on this pygame game and I'm using the mixer sub module for sounds. However, in pygame if you want to stop a sound, the sound must finish its cycle until it can be stopped. For all my sounds this is ok as they can be a looped 1 second sound. However, I use a falling sound which needs to constantly play in a cycle, but cycling a falling sound that is only 1 second long doesn't sound very effective. So, ultimately I want to know if there is a way to stop a 7 second sound loop instantly without it finishing a cycle.
According to the pygame documentation for pygame.mixer
pygame.mixer.pause()
will temporarily stop playback of all sound channels. You can start them all playing again with;
pygame.mixer.unpause()
For an individual sound, whilst it will stop after a full cycle, you can immediately affect it's volume with;
pygame.mixer.Sound.set_volume(0)
So what I'd try first is stopping the sound at the same time as setting it's volume to zero and seeing if that solves your problem. Alternatively, you can split your mixer into Channels for better controlling sound playback, which will give you the ability to use
pygame.mixer.Channel.pause()
pygame.mixer.Channel.unpause()
On specific groups of sounds rather than all sound. You create a mixer channel with;
pygame.mixer.Channel(id)
You can then play specific sounds on that channel with;
pygame.mixer.Channel.play(Sound, loops=0, maxtime=0, fade_ms=0)
This would also allow you to more dynamically adjust the levels of various types of sounds in your game - for example, environment, music, weather, voices and how they overlap each other, just keep in mind a channel can only play one sound at a time. Because of this, it may by prudent to use;
free_channel = pygame.mixer.find_channel()
free_channel.play(Sound)
or more simply;
pygame.mixer.find_channel().play(Sound)
For everything except your 'falling' channel.
I am searching for a way/framework to play at least 3 music files at one in a python application. It should run at least under ubuntu and mac as well as on the raspberry pi.
I need per channel/music file/"deck" that is played:
Control of the Volume of the Playback
Control of the start position of the playback
Play and Pause/Resume functionality
Should support mp3 (Not a must but would be great!)
Great would be built in repeat functionality really great would be a fade to the next iteration when the song is over.
If I can also play at least two video files with audio over the same framework, this would be great, but is not a must.
Has anyone an Idea? I already tried pygame but their player can play just one music file at once or has no control over the playback position.
I need that for a theatre where a background sound should be played (and started simultaneosly with the light) and when it is over, a next file fades over. while that is happening there are some effects (e.g. a bell) at a third audio layer.
I finally got an answer/workaround.
I am using pythons multiprocessing class/functionality to run multiple pygame instances.
So i can play more than one music file at a time with fully control over playmode and playback position.
I'm using the pygame function pygame.time.delay() to make pygame freeze while presenting some pictures or text, and I want to play a sound at the same time.
The problem, I think, is that in order for pygame mixer to work the main loop must be running, so putting the system on wait it also stops the mixer.
Any easy way to solve this problem? thanks
pygame.time.delay() is a bad idea for waiting while presenting things, it not only will prevent you from playing music it can also freeze your screen (blank screen).
You should process events and update the display although you have static image.
Some alternatives are:
Use a counter in your loop to know how long you should keep the same image in the screen.
Use a timer to receive a User Event that will notify you that you need to change the current state.