Click on "Upload" to choose your audio file in mp3 format. Your audio file will start loading. The process may take up to a minute or two depending on the file size. Once the loading process is finished, your audio will start playing.
Move the markers to set your desired range and clip duration by dragging your mouse through the section of your audio file. You should be able to see the "Duration" and the time codes of the "Selected Portion."
Once you have selected the desired portion of the audio file, click on “Selected” and the software should play the portion for you.
Once you are satisfied with the portion you selected, click on the Save button (diskette icon) and your new MP3 should download to your computer.