[ubuntu_studio] Need help installing Qtractor

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http://ubuntuforums.org – Greetings, I want to install Qtractor for AMD64 bit. Since it's not in the "Software Center", I'm not sure where to download it from. Is the site below a safe place to get software for Ubuntu? https://launchpad.net/ubuntu/+source/qtractor/0.5.5-1/+build/3580882 Should I use the qtractor_0.5.5-1_amd64.deb package? If so, once I download it, how do I install it? Thanks, themuseman (Hardware)