This characteristic of the blues is acknowledged as a key part of the blues format. A common belief is that people who do not feel ‘blue’, or have a ‘blue sense’, generally cannot play blues music in the manner for which it was intended.

Many blues musicians believe that a person’s ability to play blues meaningfully is a true sign of his/her worth as a musician. Inside the area of blues, the capability of playing blues with meaning is the core of the style. This is why it is believed that if a person cannot play blues with soul and significance, they cannot be considered a true bluesman.

Some particular methods of playing the blues include "rough" or "unrefined" timbres, "blue" notes such as the b3 or b

I’m troubled in mind, baby, feelin’ blue and sad.

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