In my option, Hissing at the start usually indicates needle burn.
Which happens when DJ's wind back and forward the 45 to cue up the start. The damage is done if the tracking or weight on the Cartridge / Arm is wrong.
That is why a lot of DJ's don't cue up records to save damage on decks they do not know, and usually talk over the gap at the start, or you get silence. I stopped cueing up after I damaged a Bobby Hutton Come See About me.
So If your Blue issue hisses it was mine years ago.
Best David