

im trying to fix the absence of sound. Ive been searching around to find a solution but my luck of BSD system knowledge has prevented me to find the solution.
When i enter # cat /dev/sndstat i have the following result
Installed devices:
pcm0: <Intel Haswell (HDMI/DP 8ch)> (play)
pcm1: <Realtek ALC283 (Front Analog)> (play/rec)
pcm2: <Realtek ALC283 (Rear Analog Mic)> (rec) default
No devices installed from userspace.
im changing the default device by giving
#sysctl.hw.snd.default_unit=1 , then i reboot but still i have no sound
can you help me by giving me instructions step by step?
Thank you in Advance