Mp3Merge is a free application (source code included) which invokes the DOS copy command to concatenate mp3 files which have the same bitrate together without the need to re-encode the files. Its purpose is to facilitate this task for lots of mp3 files that need to be concatenated together.


I needed a tool to help me re-join many different sermons and other lectures that I had acquired that were broken up into 5-minute segments. I preferred not to do re-encoding because it takes too much time and processing power and I’m always concerned that re-encoding will significantly change the file size or recording quality.

I looked for freeware options but couldn’t find much. Mp3 File Merger seemed promising, but I wasn’t too sure if it was actually doing something. My further digging revealed that it simply created a DOS .bat file of copy statements with the /b (binary) switch. That made me say, “hey, I could write something that does that”. So I didn’t spend any time on the actual “copy” functionality, but worked on making the process quick, easy, seemless, etc…. for me. We’ll, I’ve done that. I like it. So why not let others use it too? So, I tried to clean it up a bit and throw together a basic help file and install process. Hopefully it will work for you too. For a fuller version of how it works, take a look at the html help online.


I don’t have much time or desire to mess with it very much so I can’t promise that it will evolve much. But feel free to contact me if you have questions, feature requests or bug reports…we’ll see what happens! 😉 You can use our contact page or better yet leave a comment below.


I’ve created a non-elegant French translation of the interface (included…language is changable via an .ini file parameter) and I’d welcome corrections to that and a translation of the help file. I’d, of course welcome translations of any other language and will include them here if they come.

System Requirements:

I can’t say that I know all the real technical requirements, but it’s a Windows 32-bit application written in the AutoIt3 scripting language. I’ve tested it only on Win XP Pro, but I would expect that it would function in at least Win 2000 or better. I can’t say for 98/ME. Feel free to try it, and let me know what it has worked on.

Thanks go to:

AutoIt3 scripting language

MediaInfo .dll


Inno Setup

If you like it:

Download Version 1.0:

Change log:

2009-06-06 – version 1.0 – initial released version

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