Roland GR-300 Guitar Synth (filter modulation)

Greetings everybody! Please check out my new Myspace music page when you get a chance. The project goes by the name “Mr. Dithers.“ thanks! I have this immaculate Roland GR-300 guitar synth and the G-707 guitar controller. (I have the 505 as well which actually works better with the GR-300 but I wanted to test the 707 with the 24-pin cable I bought on Ebay!)) I am not really a guitar player but wanted to use the 300 for textures - kind of li