Thanks Cuong, I understand your good reasoning for using multiple tracks now. I want to insert background music or noise during a selected part of an audio recording. That is the second part of my previous question. From: audacity4blind-bounce@xxxxxxxxxxxxx [mailto:audacity4blind-bounce@xxxxxxxxxxxxx] On Behalf Of Cuong Dang Manh Sent: Thursday, November 21, 2013 9:29 AM To: audacity4blind@xxxxxxxxxxxxx Subject: [audacity4blind] Re: Multiple tracks and adding sound effects Hi For my knowledge, if I want to mix a backround music with a narration usign GoldWave, I must adjust its volume carefully because I cannot undo after saving. With multi track editor, I can import all of my tracks and adjust volume, or anything I like independonly in each track, and if I don't like, I can change by import the original track again. Not sure I understand the rest of your question correctly, but you can find the answer by reading the guide for using Audacity with Jaws and other screen reader from http://vip.chowo.co.uk/wp-content/uploads/jaws/Audacity-2.0.5-Guide.html HTH Cuong On 11/21/2013 9:18 PM, Stewart A Overbey Jr. wrote: Hello All, I'm producing a podcast for the first time, so, I'm using Audacity instead of my normal audio editor Goldwave. My questions to date are: Why use multiple tracks? And perhaps related, how can I rap music or a special effect around a particular section of a recording? I've been reading your help files, and am trying to learn from them. Thanks for your commitment. Sincerely, Stew