So don´t worry this is as designed. Yo will hear the drumroll sound only when performing a soft reset (pressing the power button for about 20 sec) or when starting after a complete shut down (pressing the power button for about 10 sec). But when shutting down normal to suspend mode (button for 2-3 sec) there will be no sound.
Answers & Comments
Here's the answer according to TomTom:
So don´t worry this is as designed. Yo will hear the drumroll sound only when performing a soft reset (pressing the power button for about 20 sec) or when starting after a complete shut down (pressing the power button for about 10 sec). But when shutting down normal to suspend mode (button for 2-3 sec) there will be no sound.