function [] = makeraw(wavfile, len);

% Compute the sample rate of the codec.
fsdes = round((25e6)/(12*256));
% Read the audio vector x, the sample rate fs, and the number of bits per
% sample nbits
[x,fs,nbits] = wavread(wavfile);
% Resample the audio signal to have the correct sample rate.
y = resample(x,fsdes,fs);
% Zero-pad or truncate the .wav file to be 65536 samples.
if length(y) < len,
  y = [y; zeros(len-length(y),1)];
else
  y = y(1:len);
end;
% Normalize the audio signal to have a max and min of +/- 32767, so that
% fits into a 16 bit signed number.
y = 32767*y/max(abs(y));
% Write the raw audio file to disk.
rawfile = [wavfile(1:end-3), 'raw'];
fid = fopen(rawfile,'wb');
size(y)
fwrite(fid,y,'short');
fclose(fid);