Yay DJ_O this is a great find! I knew about some of the many versions, but having them here referenced in one place makes it all the easier.
Speaking of referenced, it would be nice if we had a "Reference" section, though a bit different to "Tutorials".

Yeah it was made by Mixmax. As a result, MTVMG3 had much less bugs and glitches, but it was absolutely horrible in terms of creativity freedom.

Actually, I personally found MTVMG3 to be the most user-friendly as soon as you got used to the controls. The controls seemed strange at first, but among all the MTV programs, it always took me less time to make a song in MTVMG3 than it did in MTVMG1 and 2. In MTVMG2 and Digital Hits Factory, it was far longer than MTVMG1, however, by about 3 hours, and in Music 2002 it usually took me 6 extra hours because of the controls. I never made a song in the PC version of MTVMG nor the europe-only Music Creation software from 1998.

Anyone know where to buy music 2000 for pc?  Where do you find this program?

The pc versions of this game are nowhere to be found.  I wish it was on steam, i'd like a safe copy to download, i really don't want to deal with iso's. 

Update: Before MUSIC there was this:



it was basically MUSIC, but in its early production days it seemed to have been called NoiseToys before getting renamed to MUSIC Station then later just MUSIC.

I totally didn't know that until now, though.

Here's MUSIC final version using the default blue theme:

_{Edit (Eeems): removed broken image from bad domain}

I don't like the controls of that software. I prefer the ones in MTV Music Generator (or Music 2000 for you europeans). They're much more user-friendly. Also in MUSIC, although every sample from MTVMG are available, there are 8 fewer sound channels, which would be quite limited for my music.

Yeah the other theme is strange. Also I hate how small the song area is. In MTV it almost takes the entire screen:



As for MTVMG it's really hard to find. I found an ISO back in 2006 and kept it since, in case my second CD breaks. I had another real copy before, but the CD stopped working. Also the game only runs properly in ePSXe with the Eternal SPU sound plugin found on some emulation sites.

Of course there's also MTVMG2 which isn't too bad, but it scrolls vertically and the ADSR for notes can be hard to setup (the fact it's graphical like in MTVMG actually makes it easier, but the problem is that in MTVMG2 each note got 8 ADSR settings per note, which aren't easy to notice, so as a result, you end up changing only the first, only to barely see any note difference because you forgot to change the 7 others.)