Intentionally download only part of a file?

Hello,
is there a way to download only a certain number of bytes from a file? I have a need to delete .wav files that match certain criterias, (and download the remaining ones) so I want to download only the first 36 bytes of a file. I can then determine if I need to get the entire file or delete it from the server.

thanks

That's not possible with WinSCP.