Step 1: Click the blue + icon
Step 2: Either drag and drop your audio file or click CHOOSE FILE
Step 3: Make sure the Transcription toggle is set to ON!
Step 4: Now that the audio is loaded, clip it
For more info on clipping audio, check out How To Clip Audio During The Import Process
Step 5: Click ADD TO VIDEO
Step 6: Wait a little
Step 7: Success!