I just did a short demo song using my newly built Samplerbox device. The tune is a cover of a Sting song and is available here:
There are two tracks of mellotron in this tune. Mellotron flutes and Mellotron combined choir.
If you are interested in my Samplerbox build check out:
Thanks to Joseph and everyone working on Samplerbox upgrades for this great project. I've always wanted to experiment with a mellotron and now I can.