I now use debian 12.7 with audacity 3.5.1. Why does audacity record everything much louder than with ubuntu 23.10, including background noise?

this is odd because it didn't happen with ubuntu 23.10.

If I play my acoustic guitar and record it, output file sounds like an electric guitar, which never happened with ubuntu.

I'm also recording unwanted background noise, but now it's much louder than with ubuntu.

how come?