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Modules
You just tested your curves by dragging the PlayerHealth parameter in the RTPC graph view. Now you'll do a similar test in the Transport Control.
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In the Transport Control, select the Display RTPCs button.
The PlayerHealth RTPC and its value appear.
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Adjust the PlayerHealth property slider while listening to the heartbeat, then click the Stop button when finished.
![[Tip]](/images/wwise101/?source=wwise101&id=tip.png)
If you click the Play button more than once, multiple instances of the heartbeat sound play simultaneously. To avoid this issue, use the spacebar which alternates between playing and stopping the sound.
Congratulations, you just learned how to loop a heartbeat sound so it plays indefinitely and how to make it progressively louder and clearer as the player's health worsens. You did this by creating an RTPC curve that defines a relationship between the player's health, as reported by the game, and the volume and low-pass filter applied to the sound. Then you tested your design in both the RTPC graph view and the Transport Control. These are advanced skills that can be applied in so many different ways!
Carry on with Module 6: Using States to make your heartbeat sound stop completely when the Wwizard is defeated and resume when a new map is loaded. You'll also add it to Cube, so you can hear how it responds to gameplay.