While I was running the Silverspike RubyTube plug-in, it was in Cubase SX 2.0 and later in 3. I had a Hewlett Packard Pavilion dv8000 lap top which had a 3.0 Ghz processor and 2 GB of RAM. I’m not running it any more since I’ve had Pro Tools for a few years now which it’s not compatible for unless you’re running it on Windows and with a VST to RTAS plug-in wrapper. For those who can actually run it, I don’t think you’ll be experiencing much performance issues since it takes up a very low amount of processing power.
The Silverspike RubyTube [freeware] is a pretty early on VST plug-in that aims to emulate the sound of tubes. Of course this is no easy task, and while plug-ins have gotten better, when this was issued it really wasn’t too close. That isn’t to say that this plug-in can’t be helpful to you – just don’t expect it to be a replacement for getting real tube warmth. It’s fine for adding a bit of body and thickness to your sound, as I used to use it mostly for vocals even though it’s suitable for any instrument or voice. Not too many will be able to run this, but if you have a properly compatible system, it’s one that you might as well try for yourself if you’re at all interested…