**Additive and Subtractive Synthesis**- where frequencies (Frequency Modulation) and amplitudes (Amplitude Modulation) of tones can be added or subtracted to form new tones. Also called Interference or Interference, constructive and destructive.

Naturally Occurring Harmonics and Partials

See Also

**Amplitude Modulation**

**Comb Filter**

**Figure 1.12 - Naturally Occurring Frequencies Modes and Music Interval Relations**

**Figure 8.5 - Summation Tones**

**Figure 14.01 - Overtones Developed Musically Showing Up as Isotopes along the Vertical Axis of this Chart**

**Frequency Modulation**

**gravity multiplication**

**Interference, constructive and destructive**

**law of augmentation and multiplication of force**

**Law of Cycles**

**Law of Harmonic Pitch**

**Law of Harmonic Vibrations**

**multiplication of resistant pressure**

**Overtone Series**

**Power multiplication**

**Power of Beat Harmonics**

**Resistance**

**Summation Tone**

**synthesis**

**8.17 - Law of Harmonic Vibrations**

**8.22 - Law of Harmonic Pitch**

**1.23 - Power of Harmonics through Summation Tones**