Sound on on a server creates big lag spike

I joined a server, and as soon as I triggered something that made sound (pressure plates, fence gates) my minecraft gets a really big lag spike that won't stop, and the only way to fix this is by turning the sound off.

I fixed it by deleting my minecraft launcher.exe and deleting my /minecraft folder, but now it occurs again!

Anyone with the same problems? It worked fine for me, untill I got a new soundcard. Might that be the problem?

Thanks, Djaza