cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   rgaino
   Member

   I am noticing a volume difference when I play an audio file using CDSoundSource and when I use [[SimpleAudioEngine sharedEngine] playBackgroundMusic: ] I am not making any changes to the gain property in either case, but the same file plays with a lower volume when I use CDSoundSource.

   Did anyone ever experienced this? Is it expected behavior?

   Thanks

   Posted 4 months ago #
2. 

   rgaino
   Member

   Upon further testing, it seems that CDSoundSource's volume is affected by [[SimpleAudioEngine sharedEngine] setEffectsVolume: ]... that is really inconvenient, I'm using CDSoundSource to play a background audio file and the sounds effects have their own volume control.

   Is there a way to work around this?

   Thanks

   Posted 4 months ago #
3. 

   Steve Oldmeadow
   Administrator

   Yes, CDSoundSource and effects both use OpenAL. The effects volume is adjusting the listener volume and there is only one listener in OpenAL.

   To work around your problem you can adjust the volume of the effects individually when you play them or use CDSoundSources for everything and create a pool of effects CDSoundSources. You can add them to a CDAudioInterruptTargetGroup instance and when you want to change the volume of effects iterate over all the CDSoundSource instances in the pool and adjust their gain.

   Posted 4 months ago #
4. 

   rgaino
   Member

   Thanks Steve. I went with option 1 and it's working fine. I have a SoundManager class that wraps all calls to cocosDenshion so it was really easy to change. For future reference if anyone has the same issue I simply created a float var called soundFXGain and I now call
   
[[SimpleAudioEngine sharedEngine] playEffect:kSoundMainMenuClick pitch:1.0f pan:0.0f gain:soundFXGain];

   instead of
   
[[SimpleAudioEngine sharedEngine] playEffect:kSoundMainMenuClick];


   on all calls to playEffect: and I have removed all calls to

   [[SimpleAudioEngine sharedEngine] setEffectsVolume:soundFXGain];


   Thanks

   Posted 3 months ago #

RSS feed for this topic

Reply

You must log in to post.