Cakewalk's SONAR program is basically an upgrade to their Pro Audio/sequencing series. It does MIDI sequencing and audio recording, but the biggest advance is that it now can use "virtual" VST/DXi instruments and work with the latest low-latency Windows drivers. The reviews say it's very stable and nearly crash-proof. If you are serious about learning more about SONAR, do a web search using Goggle.com and enter in "Cakewalk Sonar review", and you'll find many good articles on what this program is about.