How to set up speaker on boot jetson nano

Hello, first of all I would like to thank this post, that help me run a script on boot. Now, I can set up camera and control servo motor automatically, but my speaker have no sound. I not sure if it’s because can’t play audio or not set up sound in speaker. But, when I test my script with sudo systemctl start boat and sudo systemctl status boat it don’t have any error.
I try to use sound.target in After= and WantedBy= , but it not work.
I use waveshare USB to audio in Jetson Nano. Could you suggest a solution to this issue? 😃

Please check below topic to see if can help: No sound output from Fe-Pi Audio Z v2.2 - Jetson & Embedded Systems / Jetson Nano - NVIDIA Developer Forums