Can I control the computer with a musical keyboard?
 

Some DAWs recognize my musical keyboard and play notes accordingly.

Getting MIDI Learn to work for general controls is a whole 'nother story though.

Anyway, just out of curiosity, is it possible to control anything in my computer with a USB musical keyboard? There are piano keys, some other keys, eight pads and eight knobs.

Edit: I just remembered that The Gimp works through MIDI. It doesn't work great, but it works. Just saying.

I guess it is possible, but probably you need to implement some kind of driver to make it work. And you can assign letters to keys (or any other actions).

Loom? :) MIDI over USB is not compatible with USB HID specifications used for typing, so while it is definitely possible, it won't be a question of gentle tweaking.

What is Loom? Is it software? Google isn't helping here.

MIDI is just a serial data stream. The usual sequence is "note on" with velocity, followed by "note off". You can get the official spec from the MIDI association website (registration required).
Ed

Loom is a wonderful old game where you cast musical spells and learned new spells by listening to the music.