Features
- Using Accelerate framework to meter input power level
How to use
self.karaoke = [[DEKaraokeController alloc] initWithBgMusic:[self bgMp3FileURL] outputURL:[self recordFileURL]];
....
- (IBAction)onStart:(id)sender {
UIButton *btn = sender;
if(self.karaoke.isRunning == NO){
__weak ViewController *weakSelf = self;
[self.karaoke startWithPowerLevelChangeCallback:^(float p) {
weakSelf.meterLabel.text = [NSString stringWithFormat:@"%f",p];
} musicFinishCallback:^{
weakSelf.recordBtn.selected = NO;
weakSelf.replayBtn.enabled = YES;
}];
btn.selected = YES;
self.replayBtn.enabled = NO;
}else{
//stop
[self.karaoke stop];
self.recordBtn.selected = NO;
self.replayBtn.enabled = YES;
}
}
References
https://blog.metova.com/audio-manipulation-using-avaudioengine
https://stackoverflow.com/questions/30641439/level-metering-with-avaudioengine
License
This code is distributed under the terms and conditions of the MIT license.