I faced this issue today, then i will share what had solved this for my case:
(Maybe the button names are different. I am using another language in Solus Plasma and trying to translate it to english.)
- Right click the 'Sound Icon' in the task manager panel.
- Click on 'Configure Audio Volume'.
- In 'General Settings', increase the 'Volume Pass' and enable all check boxes.
- If the step above don't fixed it, in 'Audio Settings', turn off the GPU audio and keep only the audio from bios activated. Then change the bios audio profile to find out one that works.