Added modulation from Jonas project BiDiLa. This modulator was implemented...

Added modulation from Jonas project BiDiLa. This modulator was implemented using mod functions instead of sin and arcsin. The carrier signal is a triangle between 0 and 1. My carrier signal starts counting up beginning with 0.5, Jonas's starts counting down beginning with 1. So, my carrier signal is delayed by a quarter period compared to Jonas' carrier signal.