In Indian music, when several instruments are played together the effect is not produced by the chord or by harmony, but by melody. Each instrument has the melody. In the West, the music is made brilliant, impressive, lively by the chords. We make it so by the melody alone. When music is played before a thousand or ten thousand people, then of course many instruments are needed. When music is played before a few listeners only, then three or four instruments only are needed, or only one. When it is used for concentration, then one instrument, one voice is quite enough. If ten instruments each play a note, then there can be no concentration, the mind is drawn to the ten notes.