I couldn’t figure out how to put a bunch of individual songs into a mix without recording or using overly-powerful sound editing applications. I found this quick-and-convenient method over at gHacks.

Only one line of code is needed to join multiple mp3 files:

copy /b *.mp3 c:new.mp3.

That’s all there is needed. The /b parameter ensures that the files are copied in binary format. *.mp3 defines the source directory of the files.

The wildcard * defines that all mp3 in the directory will be joined alphanumerically by the command. It is possible to limit the files by adding letters or numbers to the command, e.g. m*.mp3 to join all mp3 starting with the letter m.

The last part c:mp3 defines the target directory for the newly created file as well as its name. A possibility to join files with different filenames is also available. Simply

If you want to add the files in a particular order instead of alphabetically, use this command:

copy /b file1.mp3 + file2.mp3 + file3.mp3 c:new.mp3