Have you: What is the least expensive way and easiest to measure sound frequency in Hz?

produced a xylophone must maintain in mind: question FreeMind : What is the cheapest way and easiest to measure sound frequency in Hz I am sort of instrument xylophone created of cast bronze, and I want a way to narrow the field to measure it. Two thirds of the notes are not in the chromatic scale, so I can not locate a tuner for her music * NOTE:. Most notes are not in the chromatic scale. This signifies that a piano or a guitar does not play. (Without having bending notes on guitar) The

Build Your Own Marimba