No audio heard
I lost my sound from my Mac
macOS 10.15.5 (19F101
Mac (Retina 4K, 21.5-inch, Late 2015)
3.3 GHz Quad-Core Intel Core i7
16 GB 1867 MHz DDR3
Intel Iris Pro Graphics 6200 1536 MB
When I play any sound files or video I get no audio.
When I do video conference call they can hear me but I can not hear them.
I checked in system preferences and sound everything is checked but no sound.
Can you help me with this?