Right-click the timeline and choose Bars and Beats.

You can see that the timeline now shows whole number values, representing musical bars, with hash lines indicating the beats within each measure. Now you should check to see if the Bars and Beats ruler matches the music of the audio file.

Play the Explore-Arpeggio Music Segment from the beginning.

As the Play Cursor moves you may notice that the bar lines don’t quite match. For example, the larger waveform that visually occurs at bar 9 is really the downbeat of bar 10. The reason for this difference is that Wwise does not automatically detect the tempo of the audio file, so you must manually set this value. This is why it’s so important to document the tempo of the audio file as discussed in the introduction. Because the tempo was included in the filename, it’s easy to know that the tempo of this file is 138 bpm.

In Wwise, tempo is not defined at the audio file or Music Track level. It is defined at either the Music Segment level or at even higher level objects that you’ll learn about later. You can see in the Explore-Theme Music Segment Property Editor an area called Time Settings. This area includes two very important musical details that were documented directly within the names of the files you imported, Tempo and Time Signature. In each of the filenames you see information that says 138bpm4-4, except for Explore-TransToBridge in which you see 138bpm3-4. This means that all of the files have a tempo of 138 beats per minute with 4/4 time signature, except the TransToBridge file, which is in 3/4 time. In order for the timelines to match the music, you must adjust these values on each of the Music Segments. First, adjust the tempo for the currently selected Explore-Arpeggio Music Segment.

In the Explore-Arpeggio Music Segment Property Editor, change the Tempo property to 138 and play the Music Segment.

You can see that the bump in the waveform about halfway through the clip now properly aligns with measure 10.

Select each of the remaining Music Segments and change the Tempo and, if necessary, the Time Signature property values to match those documented in the filenames. Then play to confirm the timeline matches the music.