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https://elevenlabs.io/sound-effects

With the prompt "WWII Plane Japan Kawasaki Ki-61 flying by, propeller airplane" and setting looping on and 30 sec duration manually instead of auto (the duration predictor fails pretty bad at this prompt, you need to be logged in to set duration manually) it works pretty well. No idea if it's close to that specific airplane though it sounds like a ww2 plane to me though.

are there any open source alternatives to this as well if I may ask?

A fun alternative could be using a physically based engine sound synthesizer - for example - https://github.com/Engine-Simulator/engine-sim-community-edi...

you mean you want some ai product that generates sound effects from a textual prompt? elevenlabs has a model specifically for that

https://elevenlabs.io/sound-effects