Hello Fellow Developer! Two key areas need alot of help to keep mp3_check from having future difficulty they are as follows: 1) It is becoming more and more difficult to analyze the mp3 when it is coming from two different sources (ie. either a stream or a file). I have made initial steps to providing that framework to help you get started. What I planned on is that to create a buffer that can store the entire mp3 frame, then analyze the buffer (easier to seek back and forth). I think this is key for doing CRC and other types of analysis. 2) I know I had already mentioned CRC checking, but I would like to take it one step further. I would like to be able to add the CRC16 checksum into a mp3 file after the file has already been completed. I feel this would be a nice touch. If #1 above could be done, this would be quite easy to do. I had a hard time finding a CRC16 checksum algorithm written in C, but I finally did, and it is now included in the source. I have tested the code, and it works correctly. I have alot of comments in the code, so it should help guide you. p.s. Because I spend too much time working, I have a hard time keeping up with my e-mail. If you would like to correspond with other developers, please take advantage of the mp3_check ksite at sourceforge by going to https://sourceforge.net/project/?group_id=6126. If you have questions for me, plese send me an e-mail. Thanks in advance for any help you can provide, Sincerely, Eric Bullen ericb@thedeepsky.com