Theretology contains music for theremin and electronics, composed between 2000 and 2004, and performed live at a small venue called 'Cafe Theater Borra' in Amersfoort, in the centre of the Netherlands. All pieces are programmed in Max MSP, an object oriented programming language for MIDI and Audio. Gastrulation is a quiet melodic improvisation on theremin, accompanied by a low drone, with accents of the melody echoing in the distance. The sound of the theremin is shaped by Moogerfoogers (MF101 and MF102), analog effect modules made by Moog Music in Asheville, NC. Raak was originally created to be performed by a theremin player and a dancer, where the dancer controls a theremin as well. I worked closely together with Annemarie Overbeek in creating this piece, and performed it with her in the year 2000. Since then the piece developed into a 'spacial discovery' performance, often dueling a butterfly sitting on top of the pitch antenna. The timeline of the piece is strictly set in the computer. All sound manipulations are preprogrammed, and the performer interacts with his own altered sounds. Frenzy Part1 features a sensor glove. By bending my fingers I manipulate 4 individual voltages, which can either control analog synthesizers, or can be converted to digital information to control musical parameters on a computer. In this case I control various parameters of a harmonizer in Max MSP. Rook is a composition for theremin and Max MSP, in the same tradition of Raak, but a bit more experimental. Frenzy Part2 is quite experimental, as I push Max MSP into beating a very distorted theremin sound into a tight rhythm. I must confess that I let a few too many parameters open for live control, so it is rather chaotic.