CommandoAir

Thanks

This looks like what I want, but the download link is broken

Bit of a strange one, but here goes my first post. I did a quick search and haven't been able to find one, but is there a plug-in or method that will allow me to create a kind of waveform (like a sine wave sort of) where the "frequency" gradually gets longer/shorter? I could try doing it by hand, but it would irritate me like an itch knowing that it's not perfect, even if I got it to look good. This is a quick drawing of what I'm kind of after: A bit rough, just a quick scribble to get the idea across. So any ideas how to achieve this kind of pattern?