There is whole mess of software for broadcast and recording studios under linux. There are lot of professional recording studios that run linux because they can cluster computer horse power cheaply. Same as doing rendering for all those cool graphics you see in the movies.
My only word of caution would be to do your research in regards to the sound card you choose.
Here is short list, I have not looked at most of these and just gave it a two second google.
http://en.wikipedia.org/wiki/Linux_audio_softwareYea, running windows as a server is security and financial suicide on the internet. Windows was never meant to be a server or even be connected to a network. It was designed to be a desktop, and then was hacked to be a server and network client. Thus, all the inherent security problems in Windows. Windows predates network computing, and those legacy designs and limitations are still in windows Vista. Basically if you are running windows, you are running windows 98 with a whole bunch of hacks stacked on top of hacks. Linux on the other hand was modeled on Unix servers, and then modified to be a desktop.
I am not sure I posted this on this thread, but my calculations are that running an all linux shop or more specifically an open source shop saved my business more than $40,000 US last year in software in just the desktop field. That does not include any time value calculation for waisted crash time, and virus and security infrastructure required to run a windows network, or even my servers savings. I could easily add another $30,000 in software and hardware cost for the windows equivalents on the server end for mail servers, databases, file servers, and so on. I have not ran a virus scanner in like 5 years.
It now takes about 2 - 3 hours to train a new staff member in Linux (the less they know about computers the faster they learn linux), and by the end of the day they are fully productive. Really we just give them a computer and throw them to the wolves with like a 30 second intro to where essential programs are located in the menus and what they are called. There is no real training involved. The new linux kde desktops in most distros are nearly indistinguishable from windows Vista or Xp, minus the annoying graphics and strange menu behaviors.
I have one duel boot computer in the office. I had it booted the other day in windows, and one of my paralegals came in to the office to sit down to work. She came flying in to my office complaining about where her icons and programs where. She wanted her linux desktop back. She had only been using linux for about a week.
Five years ago, even the most hardcore linux advocates would not have recommended linux desktops to the average user. Really, it is more than linux. I am just using linux as a generic term. There are opensource versions for most major programs. openoffice, firefox, and bunch of others are all available for windows and macs for free. The QT programing library is being ported to windows, so even the KDE desktop will be available with most of its programs as I understand. Really, I don't know know how to do anything much more advance than how to use a mouse anymore in windows. I don't do windows.