for my use case i meant a "balance" control,
like found in
analog consoles. Having a width control (A3 style) can be
a plus, but not absolutely necessary.
<http://kokkinizita.linuxaudio.org/linuxaudio/downloads/STE-plugins-0.0.2.tar.bz2>
thank you Fons and Joel for pointing to those two plugins.
I've just installed them, and will report how magically they behave for me tonight
or tomorrow.
Raphaël