In other words, they blue-shifted the image back into the visible spectrum, which I'm sure would do a decent job of counteracting at least some of the extreme red-shift you get from observing such distant objects.
Whether they actually tried to calibrate the blue-shifting (e.g. by looking for emission spectra), I don't know, but I'm sure it wouldn't be out of the question.
I wouldn't say that the MIDI synth in your PC is necessarily a different thing - it's "effectively" the same as a hardware synthesizer in that, if you've got an appropriate adapter hooked up to your computer (whether via USB, RS232, or the old DA15 "gameport" on old soundcards), it can receive MIDI data from other devices and convert into audio to play through your speakers.
I say "effectively" because real MIDI synthesizers probably do way more than the simplistic "Microsoft GS Wavetable Synth" on all Windows installations, but there are other MIDI synths on Windows (such as VirtualMIDISynth) which do a lot more.
What about dog's milk?
"Nothing wrong with dog's milk. Full of goodness, full of vitamins, full of marrowbone jelly. Lasts longer than any other type of milk, dog's milk, (since) no bugger'll drink it. Plus, of course, the advantage of dog's milk is that when it goes off it takes exactly the same as when it's fresh."
"Hi, we've detected a virus on your machine etc etc"
"Which one? Is it my old [OS] system downstairs, or the newer one upstairs running [OS]?"
".....[click]beeeeeeeeeeeeeeee"
For best results, pick semi-recent Windows versions OSes (XP, Vista, 7, 8, or 8.1) that you aren't actually running and see if they actually try to guess which one it is, then see how they react when you casually mention that it's been turned off for the past several months or suffered from a hardware failure.
"For the man who has everything... Penicillin." -- F. Borquin