No Sound on Sims 4

The two sounds at the same time is most common and usually fixed by restarting the game.

Did you try updating your sound drivers for the high/low issue ?

First Hover your mouse to the right corner of the bottom of the screen on that tiny speaker icon, then press right click and open playback devices and then scroll to the speakers with a green sigh on it. Then select advanced and be sure that the two options are selected: allow application to take control of this device and give exclusive mode applications priority. Now the last step is to lower or raise the Bits and Hz sound quality frequencies and click apply then try and start the game. Up or down freq adjustment .This should fix it. My dad made a tuorial for this online but EA wont allow me to link to it. This should be your fix since you have sound at the flash screen then it cuts off. Remember lower the frequencey or raise it until the sound stays. He raised my frequency to 24Bit 48,000hz and my sound stayed on from the start till finish everyday since.

Temporary fix for no sound option 

find out where you're sound port is located then plug in you're headset device choose ( pc name ) speaker out if you are using the front audio port on dell or any device

if still no sound try right clicking on sims 4 icon on desktop open ( trouble shooting ) and fallow instructions. select the top option in the list. Unfortunately i haven't had the pleasure too find a fix ... you will need to fallow thees steps each time you log in. If any one has a better fix please let me know...