Went back to play Hatsune Miku for the first time in years.
I always liked this song / rhythm map:
Of course, if you don't want to hear the game-buttons being pushed, the original music video is:
And yes, if the voice sounds a bit robotic, that's the point. Hatsune Miku is a computer program, practically an "instrument" that's programmed by artists. Virtual singer if you haven't been introduced to this before. But in Japan its caused a huge number of artists to get a "singer" on their music, so a lot of Hatsune Miku songs are... seriously good compositions.
"Future Tone" is just a collection of 200+ songs (plus button-maps so that you have a basic video game on top of it). So the soundtrack is just... huge. Made by a huge variety of musicians of various skill levels. And with DLC songs constantly popping up, I don't think its really feasible to find a collection of the whole soundtrack.
---------------
A 2nd "virtual singer" (a "sister" of Hatsune Miku) is Rin, and my favorite song with her voice is Tokyo Teddy Bear:
--------
There are two male singers. I actually like the slightly lower voice of Kaito over Rin's twin brother Len. But I'm pretty sure Len is more popular... anyway, Kaito's "Snowman" is pretty good IMO.
No. I don't speak Japanese, I have no idea what they're saying, lol. Insert weeaboo taunts here.
--------
Their most popular song is probably... Senbonzakura? If I were to take a guess?