The Tonematrix is a simplified software simulation of the Tenori-on™, an electronic musical instrument. It provides a sixteen by sixteen sequencing grid that defines the notes of a one bar long sequence. The grid uses 16th note steps horizontally and a F major pentatonic scale starting at middle C and spanning three octaves vertically. Notes are always played using a sine wave approximated by quadratic functions with instant attack, fixed exponential decay and random panorama. You can program the Tonematrix through internal patterns. You can store up to eight patterns in its single pattern bank. Each pattern stores the contents of the entire sequencing grid. You can play the Tonematrix through pattern and note tracks, even simultaneously. The Tonematrix was designed as a learning tool and can be used to create simple melodies and harmonies. You can also use it as a source of notes for other instruments thanks to its note out connector.