Re: [pygame] Mixer Quit / Restart

[Wyatt Olson <wyatt.olson@xxxxxxxxx>]

Cool!  I'll await the fix whenever SDL and then Pygame release the change.

Cheers

Lenard Lindstrom wrote:
> This bug was already known and was fixed in the SDL SVN.
>
> Lenard
>
>
> Lenard Lindstrom wrote:
> > The problem is with Mix_SetPanning in SDL_mixer. The function is 
> > called by Pygame.mixer.Channel.set_volume.
> >
> > Lenard
> >
> >
> >
> > Wyatt Olson wrote:
> > > Oh well, that's fine.  I will just inform potential users that they 
> > > must convert all samples to a specific format first, and then not 
> > > restart the mixer when loading new sounds.
> > >
> > > Given that this software is to be used in a (relatively complex) 
> > > open source DIY electronic drum brain, I would imagine that 
> > > converting audio samples is probably the easiest of all the other 
> > > required steps (soldering ICs, programming microcontrollers, etc).  ;-)
> > >
> > > Cheers
> > >
> > > FT wrote:
> > > >  
> > > > Hi!
> > > >  
> > > >     It never worked, it is just that it never worked.
> > > >  
> > > > Wyatt Olson <mailto:wyatt.olson@xxxxxxxxx>
> > > > *To:* pygame-users@xxxxxxxx <mailto:pygame-users@xxxxxxxx>
> > > >
> > > > This appears to get the total number of channels, not the number of 
> > > > active channels.  However, I tried using get_busy(), but it still 
> > > > does not seem to work.
> > > >
> > > > See the following modifications to my original code:
> > > >
> > > > import pygame, time
> > > >
> > > > for x in range(10):
> > > >     print("Starting iteration " + str(x))
> > > >     print("Initializing mixer")
> > > >     pygame.mixer.init()
> > > >
> > > >     print("Loading sound")
> > > >     sound = pygame.mixer.Sound("foo.wav")
> > > >     print("Finding free channel")
> > > >     channel = pygame.mixer.find_channel()
> > > >        print("Channel object: " + str(channel))
> > > >        print("Setting volume")
> > > >     channel.set_volume(0.7)
> > > >        print("Playing sound")
> > > >     channel.play(sound)
> > > >        print("Sleeping until sound is finished playing...")
> > > >     while pygame.mixer.get_busy():
> > > >         time.sleep(1)
> > > >
> > > >     print("Quitting mixer\n\n")
> > > >     pygame.mixer.quit()
> > > >
> > > >
> > > >
> > > > This displays the same behaviour.
> > > >
> > > > In response to a previous comment about using channel.stop() before 
> > > > quitting the mixer: this does not work either, as can be seen by 
> > > > adding channel.stop() after the get_busy loop above.
> > > >
> > > >
> > > > Has anyone tried running this code themselves?  I am wondering if I 
> > > > am experiencing some obscure bug, possibly platform specific.  I am 
> > > > running on OS X, but don't have access to other systems for 
> > > > troubleshooting.  If someone else has access to a Windows or Linux 
> > > > box, and is able to prove if this fails on those systems as well, 
> > > > that may be useful.
> > > >
> > > > Cheers
> > > >
> > > > Ian Mallett wrote:
> > > > > On 7/2/08, *Wyatt Olson* <wyatt.olson@xxxxxxxxx 
> > > > > <mailto:wyatt.olson@xxxxxxxxx>> wrote:
> > > > >
> > > > >     Is there anything which can return a list of all currently active
> > > > >     channels?
> > > > >
> > > > > pygame.mixer.get_num_channels()
> > > > > This returns 0 if none are playing and > 0 if there are.

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