Well facing forwards..looking out of the front window the only sound I can hear is the clicking of the wheels on the rail ..however if I turn my head right or left ..the engine sounds suddenly appear !! ...I don't know what to do to fix this ..?
Check to see if one of them is going bad. I have a similar issue going on where looking one way has a normal volume level while looking the other way is severely muted.
Known issue with a recent update to Windows 10. MS have brought out a fix https://support.microsoft.com/en-gb/help/4517211/windows-10-update-kb4517211 Do you have this update installed?
update …...ok I found out its not only the class 24... its every locomotive !! Then I tried running it [the game] in 32 bit ..guess what ..its fixed it ...so running it in 64 bit is what is giving me problems with the sound..