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RichCopy is essentially an updated GUI and backend for Microsoft's older Robocopy. Here is a table to help you quickly know the differences between the 5 software and find the most suitable tool for yourself.I would recommend using the free Microsoft RichCopy. Afterwards, you are allowed to download the completed MP3 audio file on your local folder. With a few seconds, you can get what you need. Press the "Join" button to initiate a merging task. At the meantime, you can get an access to add fade-in, fade-out and cross-fade effect in order to get a seamless finished MP3 file. Then play them one by one and select specific fragment from the whole track by manually toggling the blue handles to set both beginning and end points. You can delete unwanted one by hit the "X" icon on the upper right corner. All added audio tracks will be shown in the central part.
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