This feature is only available in SoundPrism Pro - get it here:
There are two ways to connect SoundPrism to your PC or hardware synthesizer.
Using MIDI via WiFi on Windows requires Apple Bonjour.
After making sure Bonjour is installed and running (this might require a restart of Windows) you will have to also install rtpMIDI by Tobias Erichsen which offers Core MIDI features for Windows with an interface that looks very similar to the one on Mac OS.
It is highly recommended to use an ad-hoc (direct) wireless connection between your iDevice that SoundPrism Pro is running on and your PC. You might also want to encrypt the connection.
The video below explains the whole setup process in detail.
IMPORTANT: MIDI via USB is currently only supported on the iPad
You also can use the Apple Camera Connection Kit and connect it with a USB Midi Interface to your hardware synthesizer. Just plug in the Camera Connection Kit, attach cables to the devices you'd like to use SoundPrism Pro with and you're done. Once you've enabled MIDI in the preferences of SoundPrism it immediately sends MIDI information the the MIDI interface connected to your camera connection kit. To connect SoundPrism to your PC you'll need MIDI interfaces like the M-AUDIO MIDISPORT 2x2 and M-AUDIO MIDISPORT UNO in a setup like this: