hi,
i've made and tested on linux my new external : sonograph~.
it's a non-graphical object that lets you record, modify and playback a sonogram. I believe a graphical version of this object would require a lot of memory and would hinder performances. For this reason, i will not try to do it.
as usual, only the linux version is available but no unix specific code is included, so it should compile on windows "as is".
you can find this object @ http://ydegoyon.free.fr
cheers,
Yves/