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In-Site Spectrogram

There is a js based spectrogram made by Sumi included in the site. It can be found below.

This has been updated, and you can find the old version at: oldspec.sumianvoice.com

Open the spectrogram

How To Read a Spectrogram

See explanation here

Pitch floor

You can set a pitch floor by specifying a minimum pitch (in Hz) which will cause the program to beep annoyingly whenever the sound drops below the set value.