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    Sound channel question

    Tom2012Tom2012 Guru
    edited September 2015 in General questions
    Hey guys :)

    Been having crashes this past week with my game and tracked it back to sound channels.

    I've since learned:

    - You are limited to 32 channels, any over that will return nil.
    - Using soundChannel:setPaused(true) still takes up a sound channel
    - Using soundChannel:stop() and play() is better as it frees up the sound channel in between uses.

    This might help other people. Just wanted to check it's correct. Thanks!
    Lost Caverns - my little game on Play Store - https://play.google.com/store/apps/details?id=com.firecroc.lostcaverns
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    Comments

    • CreativeManixCreativeManix Member
      Yes exactly, Even for me sound didn't work after sometime. found that :stop() is disposing the channel. :pause() still keeps it alive.

      Likes: Tom2012

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    • SinisterSoftSinisterSoft Maintainer
      edited September 2015
      New version out soon has an extra sound player (xmp) that may also allow sound injection to any one of 64 sound channels. Nico will know more about this.

      Likes: Tom2012

      Coder, video game industry veteran (since the '80s, ❤'s assembler), arrested - never convicted hacker (in the '90s), dad of five, he/him (if that even matters!).
      https://deluxepixel.com
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    • Tom2012Tom2012 Guru
      edited September 2015
      Hmm still getting crashes,
      	self.spinnerSound = Sound.new("Sounds/spinner.wav")
 
	self.channel1 = self.spinnerSound:play(0,true)
	self.channel1:setVolume(0)
      And at the end of each level I use
      	if(self.channel1) then
		self.channel1:stop()
		self.channel1 = nil
	end
      The crash only happens when restarting a level. Its as if the empty channels are not being collected, and are still present.

      EDIT: My mistake. I was running the following loop, which was setting the sound channels to nil, without stopping them.
      	if(self.scene.spritesWithVolume) then
		for i,v in pairs(self.scene.spritesWithVolume) do
 
			if(v.channel1) then
				v.channel1:setVolume(0)
				v.channel1 = nil
			end
 
			if(v.channel2) then
				v.channel2:setVolume(0)
				v.channel2 = nil
			end
 
			end
		end
      Lost Caverns - my little game on Play Store - https://play.google.com/store/apps/details?id=com.firecroc.lostcaverns
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    • totebototebo Member
      edited September 2015
      To add to the mix, sometimes a sound can't be played for memory reasons and returns nil. That means it's good practice to check if the sound channel was actually created OK before using it.

      Likes: SinisterSoft, Tom2012

      My Gideros games: www.totebo.com
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