Found it! :
http://resonance.sourceforge.net/
Actually the interface looks totally bizzare (and not quite what I
remembered), but there's quite an original idea in there.
On Wed, 22 Jan 2003 16:56:51 +0100, Dave Griffiths wrote
I think this
must be the neon maths symbols someone mentioned too:
http://www.arts-project.org/aol/pics/scr-0.3.1-3.jpg
No it's not aRts or mbox (although John Dunn's SoftStep looks like
it's along similar lines:
http://www.algoart.com/web/softstep.htm)
Still looking - but I'm starting to think it must have been a dream.
:)
Dave