Make music on Linux with Ardour: 
If ever you’ve been curious about making music, you’ll be pleased to know that the open source digital audio workstation Ardour makes it easy and fun, regardless of your level of experience. Ardour is one of those unique applications that manages to span beginner-level hobbyists all the way to production-critical professionals and serves both equally well. Part of what makes it great is its flexibility in how you can accomplish any given task and how most common tasks have multiple levels of possible depth.
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