For some days there has been lot of missing sounds.
No shred sounds.
No pan sounds.
And alot of missing sounds for the hales.
Can this be fixed.

Did you verify?
Right click game -> properties, then
Choose verify option.

https://forums.alliedmods.net/showthread.php?t=229268

There's currently no found solution to this problem, as no-one can pinpoint what exactly is the problem, it just seems to effect certain people. You'll have to hang on and see if anything crops up

Not limited to one server or something is it? (talking above my weight kinda)

Various FF2 servers are affected by it, but like Arthur says, it doesn't just effect FF2 content, the pan and shred alert sounds are missing too (they're customized on our server). To get to the bottom of it we need to conduct some kind of audit to find some common attribute with all the broken sounds or perhaps the machines of the people who are affected by it.

I found out a way how I could fix it, I was going to my tf folder and then sounds and removed sound.cache and then it worked.

Interesting, I'll make it known that this worked

Edit - This is working for other people too; so you heard it from Arthur guys, delete sound.cache inside C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\sound to get your sounds back.