ZebraTuner Free and open source guitar tuner for your Mac
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ZebraTuner Description

Free and open source guitar tuner for your Mac ZebraTuner is a guitar tuner written in Java, comparing frequencies detected in the signal from the microphone to standard or user-defined notes.The number of notes tested and their frequency is very configurable, so ZebraTuner can be used for many other instruments and tunings.In each of the 5 panels of the program, a note name and its frequency in Hertz are displayed. ZebraTuner regularly reads data from the microphone and searches the signal for frequencies. Once a frequency is found, it is assigned to one of the 5 panels. To do this, the frequencies are "normalized", by doubling or halving them, once or several times, so the result is as close as possible to one of the frequencies shown on the panels. That is why there are 5 panels, although the guitar has 6 strings: the first and the last strings are both E, and the 2 octaves between them don't matter for ZebraTuner.(Doubling the frequency of a note results in a note with the same name but which is one octave higher, while halving it creates a note one octave lower.)A frequency assigned to a panel is represented as a vertical black line whose height corresponds to the strength of the signal. Several frequencies may be detected at any given time, and the strongest 5 of them are displayed as vertical lines in their corresponding panel. Particularly, harmonics of the main signal can be detected and displayed.Lines from previous measurements are displayed too, with a shade of gray that gets lighter as the corresponding measurement gets older, becoming invisible after 5 measurements.Also, the value in Hertz of the frequency of the strongest signal in a panel is displayed, along with a percentage indicating how much the signal deviates from the panel's frequency.Ideally the black and gray lines should be displayed such that they fall on the vertical band in the middle of a panel. How close is "close enough", depends on the particular situation. One thing to keep in mind is that the position of the lines is highly nonlinear, and the farther a line is from the middle band, the more the frequency has to change in order for the line to change its position. Requirements: · Java 1.5 or later · Microphone connected to a sound card · Some half-decent processor What's New in This Release: · Packaging: Renamed root directory to include project name. · Documentation: Added download links to documentation.

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