Well, you cannot record it on a voice memo. I have tried that before and it didn't work. You have to record through a camera. The one that records videos in your phone. Your phone could also record videos, right? So you record a music video and press the options button and set it as your ringtone like you do with pictures. I will inform yoou more because I do not have the phone with me and I will probably be more in detail next time.

I want to use a voice memo AS my ringtone on my Sanyo Katana. Can it be done? Please, someone let me know how, if it can, ASAP