Algorithm to draw waveform from audio

Question

I\'m trying to draw a waveform from a raw audio file. I demuxed/decoded an audio file using FFmpeg and I have those informations: samples buffer, the size of the samples buffer,

Answer 1

The bottom graphs simply include a longer time span, so if you increased your numSamples you would get a tighter graph. But with white noise you wont see the peaks and troughs that you will find in normal sounds / music.

So if you can increase your sample size, or at least increase your sample period (x-axis) you will start to emulate the bottom charts. Use two of them to get the stereo effect.