How to program an interval between 2 sounds?

I need to put 2 sounds in sequence. When sound 1 finishes, sound 2 initiates. 

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Do you know the length in time of the first sound? If you do you can start a clock when the first sound starts playing. Let's say the first sound is 5 seconds, then make a clock with 5000 ms and play the sound in the timer event. when the 2nd sound is played, disable  the clock.

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Chapter 9. Xylophone

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