Thanks! It seems to me that the only way to get more info is to post on the Lenovo forums, which I did: https://forums.lenovo.com/t5/Other-Linux-Discussions/Slim-7-16-AMD-No-bass-in-built-in-speakers-on-Linux/m-p/5273039 I think they only officially support Thinkpads for Linux, but I guess we'll see if this gets any response. If there's any more I could do let me know!