有没有人有通过iPhone上的midi> wav转换等播放.midi文件的经验?
答案 0 :(得分:0)
Iphone需要声音采用某些有效格式。不确定是否直接支持midi,但MacOSX附带了一个命令行工具来转换声音。
我会在声音文件上运行以下命令,将它们转换为我知道的格式。
afconvert -v -f caff -d ima4 -c 1 filename.ext
播放声音效果或环境声音,如下所示
+ (void)PlaySFX:(NSString*)name
{
NSUserDefaults* savedState = [NSUserDefaults standardUserDefaults];
if ([savedState boolForKey:SFX])
{
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (sessionCategory), &sessionCategory);
SystemSoundID sound;
AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:name ofType:@"caf"]], &sound);
AudioServicesPlaySystemSound (sound);
}
}
+ (void)StartAmbientSound
{
NSUserDefaults* savedState = [NSUserDefaults standardUserDefaults];
player = [[AVAudioPlayer alloc] initWithContentsOfURL: [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Volcano Erupting" ofType:@"caf"]] error: nil];
player.numberOfLoops = -1;
player.currentTime = 0;
player.volume = [savedState floatForKey:MUSICVOL];
[player play];
}