Partially works, but not for long.
is a software application that enhances the sound quality of audio devices. If you're looking to extend the trial period, here are a few possible approaches: letasoft sound booster trial extension work
Unfortunately, I couldn't find any official or reliable methods to extend the trial period of Letasoft Sound Booster. The software's developer, Letasoft, doesn't seem to offer any official trial extensions or promotions. Partially works, but not for long