Josh has an audio recording that has a lot of distortion. How can he fix it? Leo says he can't, really. Distortion usually means the top end of the audio recording has "clipped" causing the audio to lose the upper end. But the chatroom says that Izotope is a plugin that can repair it somewhat. Since the caller is blind, however, Leo recommends a service called Auphonic. They have professional audio restoration tools that can do the job. There's a free tier and a pay tier.
David got some iZotope software from the LAPostProduction Users group for restoring audio and he needs to upgrade it. Is there an alternative that isn't so expensive? Leo says that iZotope is the standard and it comes with free plugins, but the freebies are usually very limited. VST is the standard for the plugins they use, so if he can find some VST plugins, and there are thousands of them, he can use those.