which sound proxyxml do i edit?

so i found that a loco i have, which there are a few, but for now the dr br 86 has a loud steam pressure exhaust sound, but i dont know what to edit as i dont know what its called, can you all help?
https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=29&t=18498