使用javascript或html5录制具有特定参数的WAV音频

Question

Im trying some javascript codes to record wav sound, for example I tried this example:

http://webaudiodemos.appspot.com/AudioRecorder/index.html

That I found in this post:

HTML5 record audio to file

But I need to configure this attributes:

• Sampling Rate: 8000 Hz
• Bit Resolution: 16 (L16)
• Encoding: PCM linear (LPCM)
• Audio channel: Mono

This is not a duplicated post. The difference is that I need to generate the sound with specific configuration, like I said. I didn't find any example setting this parameters.

Answer 1

You can get the sampling you want with the sampleRate constraint .

navigator.mediaDevices.getUserMedia({audio: {sampleRate: 8000}})

Native PCM encoding is entirely up to the browser, but PCM is simple enough that, given the stream, you can certainly implement it yourself.