code: def MakeID3v1(id3):
      
  
      v1 = {}
  
      for v2id, name in {"TIT2": "title", "TPE1": "artist",
                         "TALB": "album"}.items():
          if v2id in id3:
              text = id3[v2id].text[0].encode('latin1', 'replace')[:30]
          else:
              text = b""
          v1[name] = text + (b"\x00" * (30 - len(text)))
  
      if "COMM" in id3:
          cmnt = id3["COMM"].text[0].encode('latin1', 'replace')[:28]
      else:
          cmnt = b""
      v1["comment"] = cmnt + (b"\x00" * (29 - len(cmnt)))
  
      if "TRCK" in id3:
          try:
              v1["track"] = chr_(+id3["TRCK"])
          except ValueError:
              v1["track"] = b"\x00"
      else:
          v1["track"] = b"\x00"
  
      if "TCON" in id3:
          try:
              genre = id3["TCON"].genres[0]
          except IndexError:
              pass
          else:
              if genre in TCON.GENRES:
                  v1["genre"] = chr_(TCON.GENRES.index(genre))
      if "genre" not in v1:
          v1["genre"] = b"\xff"
  
      if "TDRC" in id3:
          year = text_type(id3["TDRC"]).encode('ascii')
      elif "TYER" in id3:
          year = text_type(id3["TYER"]).encode('ascii')
      else:
          year = b""
      v1["year"] = (year + b"\x00\x00\x00\x00")[:4]
  
      return (
          b"TAG" +
          v1["title"] +
          v1["artist"] +
          v1["album"] +
          v1["year"] +
          v1["comment"] +
          v1["track"] +
          v1["genre"]
      )
docs: Return an ID3v1.1 tag string from a dict of ID3v2.4 frames.