Android 5.0无法录制96000Hz的音频



在Android 5.0L的更新中提到(http://geeknizer.com/audio-improvements-in-android-5-0-l-audiophile/), Android开始支持96000Hz的采样率。但是,当我尝试在Galaxy S6上这样做时:

void checkAvailableSampleRate(){
    for (int rate : new int[] {44100, 48000, 96000}) {  // add the rates you wish to check against
        int bufferSize = AudioRecord.getMinBufferSize(rate, AudioFormat.CHANNEL_IN_STEREO, AudioFormat.ENCODING_PCM_16BIT);
        if (bufferSize > 0) {
            // buffer size is valid, Sample rate supported
            Log.d(C.LOG_TAG,"Sample rate "+rate+" is supportted");
            // just used for debugging
            AudioRecord temp = new AudioRecord(MediaRecorder.AudioSource.MIC, rate, AudioFormat.CHANNEL_IN_STEREO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
            Log.d(C.LOG_TAG,"make audioRecord successfully ");
        }
    }
}

我无法使96000Hz工作....

下面是我得到的输出:

Sample rate 44100 is supportted
Make audioRecord successfully
Sample rate 48000 is supportted
Make audioRecord successfully
Sample rate 96000 is supportted

我的应用程序崩溃在这里,所以这意味着我可以得到minBuffer时采样率设置为96000Hz,但无法创建一个AudioRecord实例。

,这里是错误:

. lang。IllegalArgumentException: 96000Hz是不支持的样本率。

对我来说很奇怪的是,AudioRecord. getminbuffersize()在96000Hz下工作正常,但当我尝试创建96000Hz的AudioRecord时,应用程序崩溃了。

有没有人尝试在Android中录制96000Hz的音频?

-------------------------------------

这是我的gradle设置的更新:

android {
    compileSdkVersion 21
    buildToolsVersion "23.0.1"
    defaultConfig {
        applicationId "edu.umich.cse.echotag"
        minSdkVersion 21
        targetSdkVersion 21
        ndk {
            moduleName "detection"
        }
    } ....

操作系统可能支持96k,但硬件也需要支持96k才能正常工作。

getMinBufferSize可能不是检查硬件支持的采样率的可靠方法。我怎样才能知道我的平板电脑支持什么采样率?

AudioManager可以查询设备的本机参数。如果您想检查是否支持96k,这可能很有用。

        AudioManager am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
        Log.d(TAG, "onCreate: "+am.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER));
        Log.d(TAG, "onCreate: "+am.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE));
        Log.d(TAG, "onCreate: "+am.getProperty(AudioManager.PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND));
        Log.d(TAG, "onCreate: "+am.getProperty(AudioManager.PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND));

more reading http://geeknizer.com/audio-improvements-in-android-5-0-l-audiophile/

希望对你有帮助

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