附線上音頻網址及連結存取密碼，您可以上網直接聆聽、跟著練習、邊彈邊播放伴奏，或存取這些音檔。 音頻文件包括 PLAYBACK+，這是一種多功能音頻播放器，可讓您在不改變音高的情況下放慢音頻、設置循環點、更改鍵以及向左或向右平移。讓您可以像專業人士一樣暢快演奏！ 15 hits presented with professional demo and backing tracks so you canplay along and sound like a pro! Audio is accessed online using the unique code inside the book and can bestreamed or downloaded. The audio files include PLAYBACK+, a multi-functionalaudio player that allows you to slow down audio without changing pitch, setloop points, change keys, and pan left or right.