You will hear a set of duet improvisations in the style of Bach's chorales. One voice is soprano (flute), and the other is bass (cello). Some of the duets were improvised between two human musicians, while the others were between a human and an AI algorithm (AI may be either the soprano or bass). In both cases, the improvisation happened in real time, without a predetermined key or chord progression. Your task is to guess whether a duet is a human-human improvisation or a human-machine improvisation. Please also tell us how much you like it, using a scale from 1 (dislike it much) to 5 (like it much).