my sound doesnt work

ok ive installed the ps1 emu and all and im prouid to finally have it but when i play for example mega man x5 the sound doesnt come even if the games works perfectly fine. someone plz help me? and obviously i have the bios thingy for the sound

Make sure you enabled ADPCM, XA and CDDA sound on menu: "Config -> "Sound"

And pick Eternal SPU as your SPU plugin.