Musescore 4 has a terrible sound
With great effort, I eventually installed MuseHub and downloaded Muse sound. After I opened my score written using Musescore 3, I found that the sound was terrible. Then I wrote a new score using Musescore 4, hoping that a score from scratch would get normal sound. But I was wrong. I got the same awful sound. I attached my score here, which is merely a line on the piano right hand.
I did not read any manuals for Musescore 4. Maybe I have to do some set up before writing scores? Please advise. Thank you for your time.