It is a full featured DAW that has excellent MIDI (much better MIDI than ProTools) and audio. It is used for popular music but it seems to be most popular with film scoring people for some reason. I’m pretty much a solo artist/producer and have only dabbled in writing to film a couple times but I was pretty amazed at the features.
Also, it has more than a couple academy award soundtracks under its belt. Danny Elfman is a big user for instance. The Hurt Locker was done with it. Head over, there are some pretty serious professionals over on that forum and they are pretty generous with their time and advice.
http://www.motu.com/products/software/dp
Download the demo and try it - what have you go to lose?
Yes, the Focusrite interfaces, whether it's the Saffire line (FireWire), or the Scarlett line (USB), are great for this purpose. Ideally, you'll use them with a DAW (stands for Digital Audio Workstation, the term used to refer to this kind of software), like Garageband/Logic Pro (if you have a Mac), or Adobe Audition, Digital Perfomer, but there are plenty more.
As far as I understand, the MixControl software functions as a digital mixer that sends audio to your DAW, but I don't think you can use it standalone to record. Any DAW is essentially a huge mixer that can be used to record and edit your audio.
Another one that is an absolute monster at MIDI editing is MOTU's Digital Performer. I haven't used Cubase in years so I can't compare, but its MIDI flexibility pretty much destroys any other software that I've used.
Pretty sure a lot of composers use it too, kinda like Cubase. Danny Elfman in particular, iirc. Plus it's Autechre's DAW of choice haha.
I use the pitch editing tools in Digital Performer, the techniques I personally use are most likely not going to translate to whatever platform most other people around these parts are using.
Basically, DP has a melodyne/autotune style pitch edit view option on any (monophonic) audio track. This pitch information can simply be copied and pasted into a MIDI track. It's a pretty simple operation. (scroll down to the bottom of the page)
I would assume that DAWs with similar pitch correction tools would be capable of similar operations, but I'm sadly rather ignorant of other work environments. I'm currently too strapped for time and cash to familiarize myself with other software when DP meets my current needs just fine.
Get a DAW (Digital Audio Work Station) and you can manipulate the sound after you record it (with a lot of their stock plug-ins). You just need to buy and install it onto your computer or simply download it from their website or the app store (if you wanted to buy Logic).
Here are a few: https://www.apple.com/logic-pro/
https://www.steinberg.net/en/products/cubase/whats_new/whats_new_in_cubase_75.html
http://www.motu.com/products/software/dp/
If you don't feel like going too crazy with buying things you could honestly use garageband-if you have a mac.