C++ reading 16bit Wav file

Question

I\'m having trouble reading in a 16bit .wav file. I have read in the header information, however, the conversion does not seem to work.

For example, in Matlab if I r

Answer 1

There are a few problems here:

• 8 bit wavs are unsigned, but 16 bit wavs are signed. Therefore, the subtraction step given in the answers by Carl and Jay are unnecessary. I presume they just copied from your code, but they are wrong.
• 16 bit waves have a range from -32,768 to 32,767, not from -256 to 255, making the multiplication you are using incorrect anyway.
• 16-bit wavs are 2 bytes, thus you must read two bytes to make one sample, not one. You appear to be reading one character at a time. When you read the bytes, you may have to swap them if your native endianness is not little-endian.

Assuming a little-endian architecture, your code would look more like this (very close to Carl's answer):

for (int i = 0; i < size; i += 2)
{
    int c = (data[i + 1] << 8) | data[i];
    double t = c/32768.0;
    rawSignal.push_back(t);
}

for a big-endian architecture:

for (int i = 0; i < size; i += 2)
{
    int c = (data[i] << 8) | data[i+1];
    double t = c/32768.0;
    rawSignal.push_back(t);
}

That code is untested, so please LMK if it doesn't work.