Tone Guitar Tuner is a chromatic tuner for the tuning of electric and acoustic guitars on your PC using your sound card. Tuning is performed by plugging your guitar cord into the microphone jack or hold it close to a microphone connected to the sound card. The tuner automatically detects any note played on the guitar and display the musical note and frequency. Tuning of a string is indicated by a gauge needle that change color and the appearance of an arrow above the needle in the center of the gauge. The accuracy of the tuner can be adjusted between 0.01 % and 10 %. An option is also available to observe the guitar signal which is displayed in a time and frequency graph.