| 摘要 |
An audio CD contains dozens of tracks, each track having three segments. In the 1st segment is recorded a musical chord; in the 2nd a pause period of silence; in the 3rd a voice announcement of the correct answer as to what was played in the 1st segment. The CD is played in random-mode in a CD player. The system provides drills which are advantageous for teaching music students to identify and recognise chords and notes, by their sound.
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