Sea Fighter Poseidon: Enemy sound

[Luizz]

Hi.
The sound of enemy shooting is very pitched.
PCB sound is different.

[Tafoid]

Hi.
The sound of enemy shooting is very pitched.
PCB sound is different.

Some recordings/videos from PCB to better show precisely what is wrong with the sound?
Without a specific recording or comparison outside of words, one cannot hope to ever examine/fix it.

[Luizz]

In this video you can see the normal sound of enemy shooting at 00:13 seconds.
https://www.youtube.com/watch?v=iq01B4lH798&t=16s

In mame, on start screen, the sound of the enemy's harpoon shotting is pitched,