++++ This post is mirrored from here
visualizations
- Amplitude Shift keying
- Frequency Shift keying
- Quantization principle
- Delta Modulation
Amplitude modulation

This is completly made using Cinema4D and python-c4d
Source
Rest all the modulations are generated by simply switching input signal to various parameters of the signal.
Delta Modulation
Since Delta modulation is a bit different , the setup arrange is checking for the difference (0,1).