ios - 应用程序在 [[AKMicrophone alloc]initWith :[[AVAudioFormat alloc]initStandardFormatWithSampleRate:AVAudioPCMFormatFloat32 channels:2]] 上崩溃

Question

应用程序在初始化 AKMicrohone 时崩溃。

• Objective-C
• AudioKit :4.8

-(void)setupFrequencyDetector{
    @try {
        AKSettings.audioInputEnabled = true;
        //self.mic = [[AKMicrophone alloc]initWith:[[AVAudioFormat alloc]initWithCommonFormat:AVAudioPCMFormatFloat32 sampleRate:44100 channels:2 interleaved:true]];
        self.mic = [[AKMicrophone alloc]initWith:[[AVAudioFormat alloc]initStandardFormatWithSampleRate:AVAudioPCMFormatFloat32 channels:2]];
        self.tracker = [[AKFrequencyTracker alloc]init:self.mic hopSize:4096 peakCount:20];
        self.silence = [[AKBooster alloc]init:self.tracker gain:0];
        AudioKit.output = self.silence;
    } @catch (NSException *exception) {
        NSLog(@"Exception :%@",exception.description);
    } @finally {}
}

Exception :required condition is false: format.sampleRate == hwFormat.sampleRate AudioKit+StartStop.swift:start():34:No output node has been set yet, no processing will happen.

Answer 1

通过设置音频格式和采样率解决了这个问题。

AVAudioFormat *audioFormat = [AudioKit.engine.inputNode inputFormatForBus:0];
AKSettings.sampleRate = audioFormat.sampleRate;
self.mic = [[AKMicrophone alloc]initWith:audioFormat];

更新函数:

-(void)setupFrequencyDetector{
@try {
    AKSettings.audioInputEnabled = true;
    AVAudioFormat *audioFormat = [AudioKit.engine.inputNode inputFormatForBus:0];
    AKSettings.sampleRate = audioFormat.sampleRate;
    self.mic = [[AKMicrophone alloc]initWith:audioFormat];
    self.tracker = [[AKFrequencyTracker alloc]init:self.mic hopSize:4096 peakCount:20];
    self.silence = [[AKBooster alloc]init:self.tracker gain:0];
    AudioKit.output = self.silence;
} @catch (NSException *exception) {
    NSLog(@"Exception :%@",exception.description);
} @finally {}}