Getting PCM values of WAV files
- by user2431088
I have a .wav mono file (16bit,44.1kHz) and im using this code below. If im not wrong, this would give me an output of values between -1 and 1 which i can apply FFT on ( to be converted to a spectrogram later on). However, my output is no where near -1 and 1.
This is a portion of my output
7.01214599609375
17750.2552337646
8308.42733764648
0.000274658203125
1.00001525878906
0.67291259765625
1.3458251953125
16.0000305175781
24932
758.380676269531
0.0001068115234375
This is the code which i got from another post
Edit 1:
public static Double[] prepare(String wavePath, out int SampleRate)
{
Double[] data;
byte[] wave;
byte[] sR = new byte[4];
System.IO.FileStream WaveFile = System.IO.File.OpenRead(wavePath);
wave = new byte[WaveFile.Length];
data = new Double[(wave.Length - 44) / 4];//shifting the headers out of the PCM data;
WaveFile.Read(wave, 0, Convert.ToInt32(WaveFile.Length));//read the wave file into the wave variable
/***********Converting and PCM accounting***************/
for (int i = 0; i < data.Length; i += 2)
{
data[i] = BitConverter.ToInt16(wave, i) / 32768.0;
}
/**************assigning sample rate**********************/
for (int i = 24; i < 28; i++)
{
sR[i - 24] = wave[i];
}
SampleRate = BitConverter.ToInt16(sR, 0);
return data;
}
