pcm

Android AudioTrack playing .wav file, getting only white noise

由 别说谁变了你拦得住时间么 提交于 2019-11-26 11:15:14
问题 When I play a file with the following code: private void PlayAudioFileViaAudioTrack(int ResId) throws IOException { int intSize = android.media.AudioTrack.getMinBufferSize(11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, intSize, AudioTrack.MODE_STREAM); int count = 256 * 1024; // 256 kb byte[] byteData = null; byteData = new

How to get frequency from fft result?

由 依然范特西╮ 提交于 2019-11-26 10:23:24
I have recorded an array[1024] of data from my mic on my Android phone, passed it through a 1D forward DFT of the real data (setting a further 1024 bits to 0). I saved the array to a text file, and repeated this 8 times. I got back 16384 results. I opened the text file in Excel and made a graph to see what it looked like(x=index of array, y=size of number returned). There are some massive spikes (both positive and negative) in magnitude around 110, 232, and small spikes continuing in that fashion until around 1817 and 1941 where the spikes get big again, then drop again. My problem is that

How to get frequency from fft result?

由 帅比萌擦擦* 提交于 2019-11-26 02:08:27
问题 I have recorded an array[1024] of data from my mic on my Android phone, passed it through a 1D forward DFT of the real data (setting a further 1024 bits to 0). I saved the array to a text file, and repeated this 8 times. I got back 16384 results. I opened the text file in Excel and made a graph to see what it looked like(x=index of array, y=size of number returned). There are some massive spikes (both positive and negative) in magnitude around 110, 232, and small spikes continuing in that
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