MXL Slow Whoop Replication

Hi all,
Recently, I have been trying to replicate the sound of the Cerberus Pyrotronics MXL slow whoop for a personal project. However, despite trying several techniques, I have been unable to figure out the “secret recipe” so to speak…none of the things I have tried sound right.

To give you an idea of where I am, here is what I have:

Compared to the actual audio generated by the system:

Does anyone here know what kind of detail I am missing?

Thanks so much!

really all u need to do to be completely accurate is pitch ur whoop up a tiny bit at the start. that should be the only thing…

Alright thanks. I was also wondering how to get the wave to sound like that, as I feel that I have most things right with the exception of the type of wave.