function lpc_file = tnp_loadfile(datapath, file, rebuild)

full_pathfile = strcat(datapath, file);
lpc_file = strcat(full_pathfile, '.lpc');
if (rebuild || (exist(lpc_file) == 0))
  coefs = tnp_lpc(strcat(full_pathfile, '.wav'));
  dlmwrite(lpc_file, coefs);
end