Legion 16irx8h Speaker Issue

[MAkcanca]

Using the nixos-hardware/lenovo/legion/16irx8h with latest (6.9.8) linux kernel. Speaker seem to work for a few minutes after boot, then get disabled/shutdown. I could not find any related logs in journalctl -b.
I tried the default kernel 6.6 as well, same result. There is a firmware specified in https://forums.lenovo.com/t5/Ubuntu/Ubuntu-and-legion-pro-7-16IRX8H-audio-issues/m-p/5210709?page=22#6155866 firmware-TAS-2781... However this requires copying to /lib/firmware normally. I'm not very familiar with NixOS architecture just yet, any help is appreciated to make the 16irx8h work perfectly.

Another related discussion here clearlinux/distribution#2992

[MAkcanca]

Running this script https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/6/8306.2pa_2D00_byps.sh as root via ./8306.2pa_2D00_byps.sh 13 works after enabling i2c via hardware.i2c.enable = true; on configuration.nix however sound feels a bit janky, almost like it does not enable bass speakers or not enough amps, and when there is no sound for a while, it turns off the speakers again so we have to run the command again.

[MAkcanca]

Another related discussion including several hacks https://forums.lenovo.com/t5/Ubuntu/Ubuntu-and-legion-pro-7-16IRX8H-audio-issues/m-p/5210709?page=32