A fast, easy to use, free, and community supported 2D game engine
anyone know why putting any of these three in my app delegate doesn't appear to do anything?
[[SimpleAudioEngine sharedEngine] setEffectsVolume:0.5f];
[CDAudioManager sharedManager].soundEngine.masterGain=0.5f;
[CDAudioManager sharedManager].backgroundMusic.volume=0.5f;
using these 2 to play music\sound
[[SimpleAudioEngine sharedEngine] playEffect:@"xyz.wav"];
[[CDAudioManager sharedManager] playBackgroundMusic:file loop:true];
Thanks
Steve Oldmeadow
Administrator
Try setting the levels to 0.0f and see if you can hear a difference.
Little follow up. [CDAudioManager sharedManager].backgroundMusic.volume=0.1f is required to get a noticeable change and it only works after I start playing a music file.
The other one i got crazy results with. 0.1 was actually quiet, then 0.2 was more quiet then 0.1 then 0.6 appears to be full volume. Not sure whats going on there.
Steve Oldmeadow
Administrator
A noticeable change depends on your ears unless you are using a dB meter. I'm also going to guess you aren't using the latest version of CocosDenshion?
Let me clarify a bit. Without any gain change the volume was very low, .5 made no difference that I could tell and .1 was about half the volume. Then .2 was about half again the volume. It didn't seem to be linear at all.
I am using the cocosdenshion from the cocos2d beta that was released around jan\feb timeframe. I am too close to the release date of my game to update the whole thing and everything other then the sound has been working great.
Steve Oldmeadow
Administrator
This is straight from the FAQ section about gain values:
A value of 1.0 means un-attenuated/unchanged. Each division by 2 equals an attenuation of -6dB. Each multiplicaton with 2 equals an amplification of +6dB. A value of 0.0 is meaningless with respect to a logarithmic scale; it is interpreted as zero volume - the channel is effectively disabled.
dB means decibel - http://en.wikipedia.org/wiki/Decibel
If you look at the code all I am doing is setting properties on APIs that Apple provide.
Steve Oldmeadow
Administrator
If you don't like the default and you only want ten steps I suggest you simply create an array of floats that maps to how you think it should sound, if you need finer values then simple linear interpolation between your 10 control points will suffice. e.g if greyhoundgames thinks that "half volume" is 0.1 then set the 5th array element to 0.1 instead of 0.5.
Bear in mind that perception of loudness is subjective and influenced by the listening environment and the source material.
What i was trying to explain is that .2 was half the volumne of .1. Ie 0.1 was comming in louder then 0.2
I would have to go run the test again at some point to be sure.
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