Which instrument has the highest range of tones?
The answer to this question varies depending on how you measure range.

If we're referring to the highest pitch that an instrument can produce, then the answer is probably the piccolo. The piccolo is a small woodwind instrument that can produce an incredibly high pitch, making it extremely versatile in its use.

However, if we're referring to the lowest tone that an instrument can produce, then the answer is probably the double bass. The double bass is a large string instrument that can produce an incredibly low pitch, making it ideal for playing basslines.
I didn't ask for the highest or the lowest tones, but the highest RANGE.
The pipeorgan has the largest octave range among instruments. According to Wikipedia the [Boardwalk Hall Auditorium Organ](https://en.wikipedia.org/wiki/Boardwalk_Hall_Auditorium_Organ#Diaphone-Dulzian) has the largest range consisting of 7 octaves