This is very similar to the first interaction. It shares the same accent structure and dynamic scheme – only in reverse. Again, the pianist is invited to consider playing using 1/2 Ped. The piece is slower than Interaction 1 and more deliberate. The pianist can extend the tremolo passages by breaking up chords. The general effect should be of the tremolo gradually becoming more and more active and intense as the piece progresses. The music here is made entirely from pattern 28 of the Slonimsky Thesaurus.
In constructing chords suitable for left-hand performance the computer is supplied with a small library of those pitch combinations that easily fit the spread of the hand.