This is a free simple Harmonic Synthesizer built in Max MSP originally to demonstrate to my level 2 students how additive synthesis works.
A fundamental frequency can be chosen via number box or keyboard, use the red toggle button to link it to the other harmonics.
Draw in the amplitude of each harmonic and see the results, use the two right side dials to calibrate the Oscilloscope. Use the ‘Phase’ button to toggle between 0.0 and 0.25 phase offset.
Mark Towers 