You will need to download the source code from the SVN repository at SourceForge, because Rui did not release it yet. There is not a symbian binary package published, either. I've sent an unsigned installer to Rui, just in case he wants to publish the application in the Nokia OVI Store himself. I don't mind to publish it under my own account at OVI, but to do so I need some graphics and texts that I've requested to Rui, without receiving an answer yet.
QmidiCtl may be useful for your needs. My problem with it is the small size of the phones' screens, that makes it hard to use the sliders. A possible solution for this problem may be to replace the phone device by a Meego tablet like the wetab or exopc. QmidiCtl runs on these devices like on any other Linux box.