While it may look like English, pronounce the subtitle in a French accent and you'll be close to saying in French "Solo Jam Session." It is so named because it's as if there were multiple people in the room jamming together, when in reality it's only me. Oooh, such a clever title. :/

I'm actually surprised that this actually worked as well as it did.
Pretty much I just found a song I liked in iTunes (in this case it was Un Ange Passe by De-Phazz) and improvised a bass part over it. Then, I did the same thing again, but with a guitar. I then put the two together in my mixing software and put in some drum loops and the vocal samples where they would be in the original track.

I thought it sounded decent. Maybe you will too.