About QPitch
QPitch is a program to tune a musical instrument using your computer and its microphone or
line-in input. It's accurate and easy to use.
The pitch detection algorithm is based on finding the first peak in the autocorrelation of the input signal, which is computed as the inverse Fourier transform of the power spectral density. The pitch detection method is quite reliable (even if a peak may also occur at sub-harmonics or harmonics leading to an error in the estimate).
The estimated pitch is displayed on a note scale graphic, while the input signal and the autocorrelation function may be displayed using an oscilloscope-like plot. The note will be found automatically, since the program doesn't require to select the note to tune manually.
QPitch is an offspring of K3Guitune. The layout of the GUI is quite similar to the original ones, however the application has been rewritten almost from scratch to take advantage of the new features of Qt4 and to use the cross-platform PortAudio library. The FFT is performed using the FFTW library.
QPitch features
- Reliable: the pitch detection is based on the signal autocorrelation.
- Easy to use: there is no need to manually select the note to tune but it is detected automatically.
- Funny to use: the waveform of your instrument is displayed on the screen.
- Cross-platform: it is designed to run on Linux, Mac and Windows platforms with no modifications.
Author
- William Spinelli <wylliam@tiscali.it>
Mailing lists
There is a mailing lists for QPitch users and developers. Follow the link to join to this list or to browse its content.