ffmpeg

I love this project thank you!

I did some testing and it's possible to get even cleaner audio by also applying a filter on your audio... for example a high pass and a low pass filter on the raw audio stream...

```
ffmpeg -f s16le -sample_rate 44100 -i audio.raw -af "highpass=f=200, lowpass=f=3000" -f wav file-out.wav
```