The people at Arstechnica have done some research on the current state of audio editing using Linux. Most of us are using Windows or MacOS for our music production, but in the world of software development you can’t deny the open source projects that move beyond a specific platform. And especially targetting the Linux platform. Check it out, it’s a good read!
…and yes, it’s free 😉
http://arstechnica.com/guides/tweaks/linux-audio.ars