With this software, you can find the pitch of a sound, from a microphone or another source. You can tune a music intrument.
Configuration needed : this software runs only under Windows. It was tested under Windows 98 and Windows NT 4; you should not have any problem with more recent versions of Windows.
Principle : the software digitizes the signal at 8 Khz, and processes buffers of 1024 samples. The first processing is a Fast Fourier Transform (FFT) wich result is displayed. The software looks at the spectrum lines to see if frequencies stand out against the others, and in this case, it uses the frequency of the first line. Then, it refines the frequency with a step of 1/100 of semitone, using a normal Fourier Transform.
Accuracy : the accuracy of this software is the computer's clock accuracy.
Selection of the input source : use the sound card controls (mixer) : display the recording controls, select the source (for example the microphone) and adjust the recording level.
Language : you can choose between French (default) and English : just click on the corresponding button.
Other parameters : you can choose the input filter (windowing function). The default value gives good results.
Copyright Hervé Jamet - Last update on 18th may 2002