I used my Panasonic RN-402 mini-cassette recorder hooked directly to my Yaesu FT-411E ham radio or Uniden Bearcat BC-200XLT Scanner. Using the VOX set at medium sensitivity, I was able to capture rail traffic without having to listen continuously with my finger on the record button! The sounds are in WAV format and some of the files are quite large. To conserve disk space, I have edited out large gaps of silence of deleted irrelevant conversation in the communications. Please let me know if any of these sounds don't play correctly.