You can make a spectrogram using Audacity. It is free, open source software for recording and editing sounds. Audacity is available for Mac OS X, Microsoft Windows, and GNU/Linux. I am using the PC version running on Windows 7. It can be downloaded from
I am using the audio captured from this YouTube video.
Rachele Gilmore – Met Debut – Olympia
We can increase the resolution of the displayed spectrogram by selecting under Edit, Preferences, Spectrograms, Window size 4096. The default is 256. What this does is take the sample rate 44,100 Hz and divides it by 4096. The result is about 10.8 Hz. So the vertical scale goes up in steps of 10.8 Hz.
This video showed me how to install WordPress. It’s by Ryan Mcmillan. His website is http://ryanmcmillan.com/