Sound channel question

Tom2012

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!

CreativeManix

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

SinisterSoft

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.

Tom2012

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

totebo

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.