code: def wave_infochunk(path):
      
      with open(path,'rb') as file:
          if file.read(4) != b"RIFF":
              return None
          data_size = file.read(4) # container size
          if file.read(4) != b"WAVE":
              return None
          while True:
              chunkid = file.read(4)
              sizebuf = file.read(4)
              if len(sizebuf) < 4 or len(chunkid) < 4:
                  return None
              size    = struct.unpack(b'<L', sizebuf )[0]
              if chunkid[0:3] != b"fmt":
                  if size % 2 == 1:
                      seek = size + 1
                  else:
                      seek = size
                  file.seek(size,1)
              else:
                  return bytearray(b"RIFF" + data_size + b"WAVE" + chunkid + sizebuf + file.read(size))
docs: Returns a bytearray of the WAVE RIFF header and fmt
      chunk for a `WAVEDescriptor` `Summary`