10.2 Audio Combine
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The simplest and quickest is to use sox. This will processes the audio and undertake any conversions required for the final output format (from the filename extension) and so can take a little time to accomplish the combination.
Another approach is to use mp3wrap which creates an mp3 container that contains the other original mp3 files. The resulting mp3 filename includes the string MP3WRAP to identify it as a container. The following tags are also added, identifying mp3wrap: title, artist, album, and comment.. There is a companion mp3splt to recover the original mp3 files.
We can also use ffmpeg to concatenate audio files with different encodings even.
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