Example exercise sounds persist after user starts exercise, which are detected as the user's voice

[plastichotsprings]

The voice samples meant to help users find/hear the target pitch for the Pitch Perfect exercise do not stop when the user starts the exercise (adding code to stop the player upon "start exercise" button press does not work for some reason). As a result, if the user is not using headphones, the pitch detection algorithm detects the voice as being on pitch and completes the exercise.

One suggested solution is to reduce the length of the sample sounds.