Creat a muffled sound

Hello all, I am recording a story for children with sound effects that are supposed to be in another room. How can I do that so the sound is somewhat muffled?
Thank you!

Try the Graphic EQ and pull-down the higher frequencies (the higher frequencies are to the right). You’ll just have to experiment with the settings.

You can also try a small amount of Reverb. Reverb isn’t really related to distance, but depending on the settings it can give you the sound of a large room and it may help with the illusion.

There is a free VST3 plugin which can do that …

Soundly | The Complete Sound Effect Platform #Plugin