The accompanying audio recordings are essential for practicing this method. You can access them through several platforms: Official and Major Hosting Platforms
Since you have the audio, here is a proper guide on how to use it effectively to boost your band score. i--- Perfect Ielts Listening Dictation Vol.1 Audio
Which do you find hardest (Section 1, 2, 3, or 4)? i--- Perfect Ielts Listening Dictation Vol.1 Audio