Sequoia is described as 'Magix Sequoia is a powerful, full-featured audio production, broadcasting, post-production and mastering solution designed for big studio sound engineers' and is an app in the Audio & Music category. There are five alternatives to Sequoia for Mac, Windows, Linux and BSD. The best alternative is Ardour, which is both free and Open Source. Other great apps like Sequoia are Adobe Audition (Paid), Studio One (Paid), Avid Pro Tools (Freemium) and Harrison Mixbus (Paid).
Ardour is a hard disk recorder and digital audio workstation application. It runs on GNU/Linux, Mac OS X, and Windows. Ardour's intention is to provide digital audio workstation software suitable for professional use.