Hi Miriam - My problem seems to have been with the wav file I was using. I'd always assumed a wav file consisted of little more than raw binary samples, in what case there'd be very little to go wrong, but it seems the structure is more complicated than that. In particular, the file I was using was one of the standard Windows sounds taken from c:\Windows\media, which are in stereo. I imagine Pygame must be able to play stereo wav files, given the right settings, but not with the defaults.
I eventually came across the GPIO Music Box at https://www.raspberrypi.org/learning/gpio-music-box/worksheet/ which contains a very simple demo program using the Sonic Pi sounds which are pre-installed in|/opt/sonic-pi/etc/samples/| Running my Pi headless and logging in with PuTTy I got an xcb_comection error message, which I got rid of by typing unset DISPLAY at the shell prompt before launching the Pygame program. Hope that helps. Regards - Philip On 05/06/2015 12:20, Miriam English wrote: > Ah. Then by elimination it does seem that python/pygame on Raspberry > Pi is the source of the problem somehow. Good luck. Let us know when > you solve it. I have a Raspberry Pi too and though I haven't got > around to playing with python and pygame on it yet, I hope to in the > future. :) > > Cheers, > > - Miriam > > On 05/06/15 20:19, Philip Le Riche wrote: >> Thanks Miriam, but since I can play sounds with omxplayer that wouldn't >> seem to be the problem. >> >> Kind regards - Philip >> >> On 05/06/2015 09:52, Miriam English wrote: >>> It just occurred to me that I recall reading somewhere that there are >>> 2 sound outputs in the Raspberry Pi (the audio jack, and the HDMI >>> connector) and that some people have had difficulty switching between >>> them. You are probably trying to get sound from the audio jack. Did >>> you check whether there was sound coming from the HDMI connector? Or >>> if you're doing it the other way, did you check the audio jack? >>> >>> Just a thought. :) >>> >>> Good luck to you, >>> >>> - Miriam >>> >>> On 05/06/15 18:10, Philip Le Riche wrote: >>>> I got rid of the xcb_connection_has_error() by unsetting shell >>>> environment variable DISPLAY, which PuTTy was helpfully setting for me >>>> (for good reason in other circumstances). >>>> >>>> The line os.environ["SDL_VIDEODRIVER"] = "dummy" still seems to be >>>> necessary. >>>> >>>> However, I still get no sound. I'll try the RPi forums and see what >>>> anyone can suggest there. >>>> >>>> Regards - Philip >>>> >>>> On 04/06/2015 20:45, Michael Lutinsky wrote: >>>>> >>>>> I can verify that running: >>>>> >>>>> $ python /usr/lib/python2.7/dist-packages/pygame/examples/sound.py >>>>> >>>>> plays without error on my Kubuntu distro (x86_64 Linux kernel >>>>> 3.19.0-18, pulseaudio 6.0). Must be a RPi issue? >>>>> >>>>> ~ Michael >>>>> >>>>> >>>>> On Wed : Jun 3, 2015 10:38:41 AM you wrote: >>>>> >>>>>> Well, this is strange. In >>>>> >>>>>> /usr/lib/python2.7/dist-packages/pygame/examples there is >>>>> sound.py. This >>>>> >>>>>> must have worked for someone once, and it doesn't include anything >>>>> about >>>>> >>>>>> creating a window. When I run it for the first time it makes a >>>>> click but >>>>> >>>>>> doesn't play the sound. It produces the xcb_connection_has_error() >>>>> >>>>>> message but seems to ignore it. >>>>> >>>>>> >>>>> >>>>>> Adding pygame.display.set_mode((1,1)) to my program (which >>>>> otherwise now >>>>> >>>>>> is very similar to sound.py) doesn't help. This is driving me nuts! >>>>> >>>>>> >>>>> >>>>>> Regards - Philip >>>>> >>>>>> >>>>> >>>>>> On 02/06/2015 13:58, diliup gabadamudalige wrote: >>>>> >>>>>>> to do most things with pygame you need to initialize a pygame >>>>> window. >>>>> >>>>>>> >>>>> >>>>>>> On Tue, Jun 2, 2015 at 3:50 AM, B W <stabbingfin...@gmail.com >>>>> >>>>>>> <mailto:stabbingfin...@gmail.com>> wrote: >>>>> >>>>>>> >>>>> >>>>>>> Hi, you cannot use the dummy video driver if you want sound. At >>>>> >>>>>>> least I have not figured out a way to do it. You need at least a >>>>> >>>>>>> 1x1 window. >>>>> >>>>>>> >>>>> >>>>>>> Gumm >>>>> >>>>>>> >>>>> >>>>>>> On Mon, Jun 1, 2015 at 2:11 PM, Philip Le Riche >>>>> >>>>>>> <phi...@blueskylark.org <mailto:phi...@blueskylark.org>> wrote: >>>>> >>>>>>> >>>>> >>>>>>> Just trying to get started with pygame and stuck at square 1. >>>>> >>>>>>> All I want to do is play sounds on a Raspberry Pi (Raspbian). >>>>> >>>>>>> No screen. Nothing visual. So I do: >>>>> >>>>>>> >>>>> >>>>>>> import pygame, os, sys >>>>> >>>>>>> from pygame.locals import * >>>>> >>>>>>> >>>>> >>>>>>> os.environ["SDL_VIDEODRIVER"] = "dummy" >>>>> >>>>>>> >>>>> >>>>>>> pygame.mixer.init() >>>>> >>>>>>> sound = pygame.mixer.Sound("Exclamation.wav") >>>>> >>>>>>> sound.play(loops = 0) >>>>> >>>>>>> while pygame.mixer.music.get_busy() == True: >>>>> >>>>>>> continue >>>>> >>>>>>> >>>>> >>>>>>> Having saved it in file try.py, I do >>>>> >>>>>>> >>>>> >>>>>>> python try.py >>>>> >>>>>>> >>>>> >>>>>>> and get >>>>> >>>>>>> >>>>> >>>>>>> xcb_connection_has_error() returned true >>>>> >>>>>>> >>>>> >>>>>>> Yes, I've done an apt-get update and upgrade. I can make >>>>> >>>>>>> sounds with Sonic Pi but this produces nothing. Googling the >>>>> >>>>>>> error seemed to give no relevant results. Can someone give me >>>>> >>>>>>> a hint please? >>>>> >>>>>>> >>>>> >>>>>>> Regards - Philip >>>>> >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> >>>>> >>>>>>> http://www.diliupg.com >>>>> >>>>>>> http://soft.diliupg.com/ >>>>> >>>>>>> >>>>> >>>>>>> >>>>> ********************************************************************************************** >>>>> >>>>> >>>>> >>>>>>> This e-mail is confidential. It may also be legally privileged. >>>>> If you >>>>> >>>>>>> are not the intended recipient or have received it in error, please >>>>> >>>>>>> delete it and all copies from your system and notify the sender >>>>> >>>>>>> immediately by return e-mail. Any unauthorized reading, >>>>> reproducing, >>>>> >>>>>>> printing or further dissemination of this e-mail or its contents is >>>>> >>>>>>> strictly prohibited and may be unlawful. Internet communications >>>>> >>>>>>> cannot be guaranteed to be timely, secure, error or virus-free. The >>>>> >>>>>>> sender does not accept liability for any errors or omissions. >>>>> >>>>>>> >>>>> ********************************************************************************************** >>>>> >>>>> >>>>> >>>>>>> >>>>> >>>>>> >>>>> >>>> >>> >> >> >
