尝试将mp3转换成midi，测试样例用的是to the moon中的for River，我很喜欢！
"For River" is a MIDI music piece in Easy Listening style, played by Acoustic Grand Piano solo.
The total duration of this midi music is 1 minute and 35 seconds, with a total of 1,642 notes, Stored in a TYPE 0 format file which has only one track, and a single tempo of 120bpm.
The For River.mid file uses only one instrument and is located on one track, which can be regarded as a single-track MIDI file.
|Composer:||Kan R. Gao|
File formatMIDI TYPE 0
File size12.86 KB
Channels and Instruments
Used 1 channel, 1 instrument
Acoustic Grand Piano
1,312 notes/chords，avg. pitch E4Program ID: 0, Track: 0
time: 00:00 - 01:36
pitch: A#1 - F7
only 1 track is used, 1 track has notes
|0||1||Acoustic Grand Piano|