Wolfgang Amadeus Mozart thought that G minor was the most suitable key for showing sadness and tragedy , and many of his minor key works are in G minor , such as the Piano Quartet No. 1 and the String Quintet in G minor . Wolfgang Amadeus Mozart considered G minor the key most suitable for expressing sadness and tragedy , and many of his minor key works are in G minor , such as the Piano Quartet No. 1 and the String Quintet in G minor .