iZotope's RX7 is the very latest in audio analysis and repair tools. With a modular design, it can be used as a standalone application but also works as individual processors inside your DAW. Running as plug-ins, they can help you to zero in on specific problems and use only the tools you need to fix a specific problem. And there are additional ways to get audio between RX and your DAW as well. In this video from the course iZotope RX7 301: The Unofficial Video Manual, Joe Albano shows you how this process works.
Joe starts by showing you how to call up individual modules inside any DAW - all major formats are supported and there's also the RX Connect module that can be used to send data between the plugins and the standalone version of RX. There's even greater flexibility with the ability to actually route audio between the standalone version of RX and your DAW's mixer using aux channels too.
By incorporating RX into your DAW workflow in any of the ways shown in the video: plug-in, Connect or aux channel, you can get much more detailed control over audio repair, restoration and general editing than your DAW offers via its own tools. So in addition to a great standalone app, you're getting a powerful plugin set too! Check out the full course for a comprehensive, 2hr+ guide to iZotope's RX7.