If for some reason you can't use the sound patch, and having CPU problem with this game and want to force single core cpu without alt tab every time you play and don't want to use other programs to do so:
Simply right click your silent hill 2 shortcut, at the target, enter:
C:\Windows\System32\cmd.exe /c start "" /affinity 1 "D:\Games\Silent Hill\Silent Hill 2 Directors Cut\sh2pc.exe"
All quotes (") needs to be entered. Change the game directory to your sh2pc.exe folder accordingly. This will launch the command line and launch the game with single processor, affinity 1, 1 means CPU 0. You can change it to 2 if you want for CPU 1.
Found this on some forum but couldn't find it again.
For those wanting to force single core CPU on this game
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