Matt's name-that-tune meme

Okay, a variation on the preceding meme, taken from occultatio. The idea is, you get the first few seconds of the song before any lyrics start, and you have to try and identify the song from that much introduction. Note: a few of these are from pieces with no lyrics at all; and in one, the lyricless introduction is actually much longer than the excerpt provided here.

1;2;3;4;5
6;7;8;9;10
11;12;13;14;15
16;17;18;19;20
21;22;23;24;25
26;27;28;29;30

Added data!

For the eight unsolved ones, following brokenwndw, I've picked four seconds at random out of the middle of the song, to aid in your identification. But, to make it a little bit more fun, I don't tell you which of the eight new excerpts matches to which of the eight unsolved introductions.

A;B;C;D;E;F;G;H

Hm. I suppose there's less variety here than I expected. So it goes. Correctly guessed ones are highlighted, and their answers are here.

Edit, 16 June: All the correct answers are now listed on the answer sheet, including the three unguessed ones.