https://global-download.acer.com/GDFiles/Driver/Audio/Audio_Realtek_6.0.9038.1_W10x64_A.zip?acerid=637493234200352186&Step1=ULTRA-THIN&Step2=SWIFT&Step3=SF114-32&OS=ALL&LC=en&BC=ACER&SC=PA_6
Unzip this and update driver manually from device manager. It works for me.