![]() In the real world sound waves are irregular and noisy. Most of the sounds we hear aren't simple, uniform waves. ![]() For example, a string vibrating at 440 Hz (cycles per second) generates a sound wave with a wavelength of approximately 2.5 feet (~80 cm) that we call A4 (the A just above middle C).īut pure tones are rare in practice. The vibrating strings create (acoustically or electronically) variations in air pressure - sound waves - that our ears interpret as sound.Ī sound wave with a specific wavelength (an oscillation at a specific frequency) creates a pure tone. The spectrogram is indicates the intensity of individual frequencies in the input signal.Īs you know, your guitar generates sound from the vibrations of the strings. They can be used to get a better sense of how FATpick is hearing the sound of your instrument. These add a bit of flair, but they aren't just eye-candy. For example, E2 (the note generated by the open 6th string in a standard guitar tuning) has frequency of approximately 82 Hz and middle C (C3) has frequency around 262 Hz.īelow the primary tuner gauge you will find a couple of other visualizations of the audio signal. The exact frequency of the detected pitch is displayed below the gauge, in Hz. Since natural fluctuations can make it difficult to keep the needle perfectly centered at all times, anything in the center region of the gauge might be considered "in tune", but try to get the needle as close to vertical as you can. When slightly sharp (above the expected frequency) the needle will point to the right. When the current frequency is slightly flat (below the expected value) the needle will point to the left of center. The needle will hover near the center of the gauge when the detected pitch is close to the expected frequency. The needle indicates how close the pitch is to the exact frequency of the detected note. This is the name of the note that is closest to the primary pitch currently detected in the input signal. The detected note (or more accurately, pitch class) is displayed at the top of the gauge, as one of the 12 notes of the chromatic scale (C, C#/Db, D, D#/Eb, E, F, F#/Gb, G, G#/Ab, A, A#/Bb, B). The primary component of the interface is a gauge similar to what you might find on a tuner guitar pedal or other electronic tuner. The tuner provides a graphical representation of the detected pitch and related information about the audio signal picked up by the microphone (or other input device).
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