gStrings - Tuner

Rating: 3.7/5 (15 votes)

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gStrings - Tuner


gStrings is a chromatic tuner application measuring sound pitch and intensity.


About gStrings - Tuner

Download latest version of gStrings - Tuner apk file for android phones or other device.

gStrings - Tuner info

gStrings - Tuner is developed by who posted it to Android Freeware on May 29, 2010. It is avaliable as free download in its latest version 1.00 and has the following requirements to your devices in order to run properly: Android.

gStrings - Tuner android app is added in Tools category on our site. It is one of the best tools, tunes, music, instruments, orchestra, violin, viola, violoncello, bass, guitar, piano, wind applications which you may use if you need a tools app. It has been rated 3.73 out of 5 stars from 15 votes which users on this site has left. Taking this into account along with the high number of users who bookmark this app as favorite, we may suggest that downloading it is a good choice for your collection of android tools. Please leave a review or rate it so other visitors on Android Freeware can know your likes and dislikes. has made this app available to satisfy the demand for quality tools software. specializes in developing tools apps for Android devices and gStrings - Tuner is one of its top apps.

We have counted total 15042 downloads by our users over time. Download can be performed directly from your android device browser or with file manager application. Some users may experience the situation of not starting the installation after clicking its name. This is due to restrictions in default settings of android, which can be bypassed by enabling installation from Unknown Sources in your Android Settings. gStrings - Tuner apk latest version is 1.00 and it is uploaded to our apk mirror, scanned for malware, virus free. You can download this apk file or go to Google Play. Downloaded APK file can be run on every popular android emulator you can think of.

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Description by

gStrings is a chromatic tuner application for the android mobile device software stack. It will let you tune any musical instrument, such as the violin, viola, violoncello, bass, guitar, piano and wind instruments. Its free as in free beer, available for download through the android market.

gStrings Screenshots

The main screen consists of a horizontally scrollable tone selector on the top, an analog measuring gadget and control buttons.

Press Sound 'target' to listen to a reference tone of your selection from the list of tones on the top. The microphone is turned off and no input is analyzed in this mode.

Press Tune 'target' to tune the selected tone of the tone list on top. At this point your microphone is activated and the sampled sound is analyzed to determine the most dominant frequency/pitch. The measurement continues until the intensity of the input sound remains above a threshold value. Input intensity, as well as the measured frequency are displayed on the gadget continuously.

Pressing Tune auto will result in the input being analyzed similarly to 'Tune target', with one exception: in this mode, the selected tone of the tone list will update dynamically as well, so that the selection is always as close to the measured value as possible.

ATTENTION: Please set the microphone sensitivity before attempting to tune using either 'Tune target' or 'Tune auto'. More information about the microphone sensitivity can be found in the SETTINGS section below.

NOTE: To make the use of gStrings 'musically educational' as well, it is recommended that you first attempt to tune your string on your own. Once you are done, use 'Sound target' to listen to the note you should have tuned your string to. Now make adjustments until you believe your string is in tune with the target tone played back. Finally, use 'Tune target' or 'Tune auto' to validate/correct your results.


The list of settings can be reached by pressing the 'MENU' button of your phone, followed by a click on the Settings Menu Item. Please beware of modifying any of the advanced settings, unless you understand what they do. On the other hand, you are encouraged to modify the basic settings.

Microphone Sensitivity is the most important item in the list. It will let you set the threshold intensity (ITH) specific to your mic and your device's current environment. Only sounds with intensities above ITH get analyzed while tuning.
Setting a proper ITH value is a tradeoff. On the one hand, a relatively high ITH is preferable to filter out as much noise as possible. On the other hand, we need a low enough value to provide our tuner with input from our instrument for as long as possible.

Ideally, ITH should be set to a level, so that the sound we are producing with our instrument would keep its intensity above the threshold for at least a second, before fading below it.

Optimize For will let you pick your instrument. The pitch evaluation algorithm is slightly customized to reflect your choice.

Orchestra Tuning allows you to adjust tone frequencies. Classical orchestras often tune to 443Hz 'A', instead of the standard 440Hz. For this reason, you may manually shift the frequency of a single tone and have all the other tones changed with respect to your custom reference tone. You may also let the tuner adapt to a sound recorded through the microphone automatically (e.g. the oboe). This is useful if you need to tune to another instrument that you would like to use as a reference instrument.

Use HPS (Harmonic Product Spectrum) searches for the presence of harmonic waves in the input. Each string produces its own characteristic standing wave pattern, consisting of specific frequencies (known as harmonic frequencies) of vibration.
With HPS enabled, only tones with higher harmonics present in the frequency domain are considered.

HPS Depth will let you set the number of required harmonics, if HPS is enabled. Use it with caution. Although HPS is a powerful tool to distinguish sounds of an instrument from noise, a missing required higher harmonic will result in the given fundamental being thrown away.

FFT Rounding when enabled, will slightly increase (not a typo) the precision of the pitch detection algorithm. The rounding is applied inside the integer arithmetic fast fourier transform (android devices may not have a HW floating point unit) to the least significant bit of a shifted operand during multiplications. Note however, that this extra precision comes at a price of an extra ~10% CPU/battery usage.

Tampering Function will let you pick either a Gauss or a Hann window for wrapping the sampled input. Both of these functions are widely used in signal processing, with Hann being most commonly used in FFT audio processing. However, due to the way our pitch detection algorithm uses parabolic interpolation of FFT bins to best approximate peak values, a Gauss window will probably do better in most cases for this application.

gStrings - Tuner Requirements:

Size 1.4 Mb
Downloads 15042

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