Voice sound quality

Hello,

first things first, I love this app, it's easy to use and voices are great. I am wondering about one thing though. While the voices are great when it comes to speed, narration and pleasant to listen to, it seems like they lack in a raw quality. Like the sound difference between 360p video and 1080p video. They sound a bit muffled.

Video explaination: https://youtube.com/shorts/aGu7JXPLH4M

Voice quality compared to Edge tts.

Is there any chance to improve this?

Many thanks!