I reviewed the 'librispeech.py' file and identified a potential issue with duplicate directory paths affecting transcript file access.

**Issue**: Duplicate directory path in transcript file access
- **Evidence**: The issue is in this code snippet:
  ```python
  # Within the _generate_librispeech_examples function
  transcripts_glob = os.path.join(directory, "LibriSpeech", "*/*/*/*.txt")
  for transcript_file in tf.io.gfile.glob(transcripts_glob):
      path = os.path.dirname(transcript_file)
      with tf.io.gfile.GFile(os.path.join(path, transcript_file)) as f:
  ```
- **Description**: The `os.path.join(path, transcript_file)` call incorrectly concatenates the path, creating a duplicate directory path, which may cause errors in accessing transcript files. The path should be constructed without duplicating the directory path.

Would you like me to identify more issues or investigate anything else?