This is the first song that I have used real, recorded audio, and not just synthesizes and samples. I used a Sennheiser e614 microphone to record myself playing cello and guitar. It was really fun and I would like to do more such things in the future. I probably will.
If you go to my YouTube channel, you can see a few seconds of me playing the instruments together with the music. www.youtube.com/verack22
I also got a few videos of me solving Rubik's cubes if you wanna see =P