A tool that use for fine to decorate the sound of , organ , piano , have the pitch is equal. By have the accuracy is similar to with compare with the sound of the professional. But use the ability in listenning sound beat. At happen between 2 frequency sounds that confute by use origin frequency pillar circuit in 250.830 kHz frequency occurrences. For feed to reach first part of 5 IC. Which build the circuit divides by the frequency model a program.
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