How to Merge Multiple Audio Files Into One Long MP3 File
У вашего броузера проблема в совместимости с HTML5
It's a common task and so easy to complete inside Adobe Audition. When you use the Open Append option you'll create one long audio file with markers to indicate start and end times. You can then use the Diagnostics window to delete silences and you have a well edited long MP3 file from multiple audio files.