Hi all
I just downloaded a spectrograph for use on a PC. It shows a realtime representation of microphone input in terms of frequency on the Y axis, time on the X axis, and strength of each point on the graph is represented by intensity of colour.
You can use the microphone directly, or you can put a line into the microphone hole in the soundcard (eg from minidisc), and listen to any recorded voices you've got available. (remember to turn the sound output off on your PC or you'll get feedback).
It is really fascinating, as it shows you the frequencies (fundamental and harmonics) in the voice, and you can actually see the controlled vibrato in classical singers. You can actually SEE the quality! Cecilia Bartoli sings like woven herringbone....

I've only just started using it, and wondered if anyone else has used one & if they've any advice or info.

If anyone wants a copy they can download it from here . It is freeware and has no trial period limitations.
It requires directx 6.1 or higher, and Windows 95/9 (I'm running it fine on XP), and a full duplex sound card (I expect most are).
It does mess with the colour scheme a tiny bit using the directx software, so watch out for that - but I expect it is reset when you reload.
What do you reckon people??

Kris