30 minutes of continually changing arpeggios, following a set of mathematically determined combinations, written for pianist John McAlpine.

Four movements with a mathematical melody in one, two, three, and finally four voices. 6 minutes.

Five movements in 14 minutes.

Piece for player piano, in collaboration with Wolfgang Heisig. No score, just another roll, ready to roll.

Exactly 60 minutes of music for piano.

Short sequences of rational harmonies, scored for toy piano, written for Isabel Ettenauer, who has also played other pieces by the composer.

Nine pieces written in 1988 for the 88 keys of the piano.

Composed in 1976, this piece is an early work by Tom. Written in minimal style in hommage to D. Scarlatti. First published in 2013. 

A collection of movements extracted from Organ and Silence, dedicated to John McAlpine. Premiered in Düsseldorf in September, 29, 2002. 25 minutes.

A young pianist can play a particular exercise 216 times in a single practice session of 45 minutes. How many times can he play the exercise in one minute? This and 13 other "piano problems," originally

After each phrase, the listener is asked to decide whether the two things heard were the same or different. This test of perception skills can be presented silently and discreetly, or with vocal audience

The pianist talks and plays with his collaborator, a loudspeaker. A performance tape, made by the composer in 1969, is available, but it is preferable to make a new one, with the performer's own voice and

A variable loop turning around on seven piano keys. Written in 1973 and revised in 1993. About 12 minutes.

Twelve minutes of tranquil music, where one senses the influence of Morton Feldman, with whom Johnson studied just before, in 1967-68. 12 minute.

120 permutations of a melody played with an Argentine beat.

How can different rhythmic patterns be combined in such a way that no two patterns ever occur simultaneously and every beat is filled? "Tiling the line" is a subject that Johnson and several mathematicians

A challenge for a pianist who can play, talk, and make recordings. Score in English. 10 minutes.

Twelve piano pieces derived from the block design (12,4,3). Each piece contains 33 four-note chords, all 12 notes occur the same number of times, and the rigor and symmetry are considerably greater than in

For piano. Short pieces based on a computer program. Contents: From Networks; Originals and Copies; Sampson's Solution; Pathways 1 to 33; Slow changes; Quatrains; 11 Times 3; Harmonic Stability;

Piece for player piano, in collaboration with Wolfgang Heisig. No score, just the roll, ready to roll.

Four pianists repeat a single phrase. The music is always the same, but the distributions of the notes, the "voicings," are always changing.