how to fix audio distortion when I play an AudioSource?

have a space ship as my main character , it is a fast moving character.

I have placed 4 audio sources on empty gameobjects and I place the gameobjects on the ship.

the Priority for all four audio sources have been set to 0

I wrote a function to simply play the audio sources when i press certain keys .

the audio listener is on the camera following the ship.

now it works fine when the ship is stationary .
but when the ship reaches high speeds the audio becomes extremely distorted and it sounds like a mangled mess of noise and squeaks and all manner of audio corruption.

how do I fix this ?

In the Audio Manager, try setting the Doppler Factor to zero.