Farz

The instruments that cross the: bass, mid and high frequencies aren't certainly specific. Every instrument crosses every zone of bass, mid and high frequencies. However, some instruments will be set in different places depending on natural pitch and sound of the instrument. For example, the bass would fall under bass and sub bass due to its low tone. Guitar would fall under the mid section as the strings can be differentiated between high and bass and an instrument like a flute or a clarinet will fall under the high frequencies due to the high pitch.