8.2.6.1 FM/DFM

FM/DFM: Frequency Modulation / Differential Frequency Modulation

The VA-Beast Oscillator section supports two main types of Frequency Modulation.

In FM mode the modulation depth is fully under control of the depth parameter. FM is the rawer and more aggressive mode.

In DFM mode the modulation depth stands in direct relation to the played note, which makes it more “controllable”. In other words it is easier to create perfectly tonal playable sounds (over the complete frequency spectrum).

Notice that the OSC Mix is fully set to OSC1 (see screen shot), which means OSC2 is not directly audible (it’s only used to modulate OSC1).

Depth:

Controls the depth/amount of the Frequency Modulation (OSC2 > OSC1).

Note: A good practice is to modulate the OSC MOD Depth with one of the Modulation Envelopes as shown in the screen shot above.

By running both Oscillators in Dual Sine FM mode while using FM/DFM, you can create a 4 Operator FM Engine, which makes it very easy to create complex FM sounds.

Depth:

Controls the depth/amount of the Frequency Modulation (OSC2 > OSC1).

Note:

As soon as an OSC gets frequency modulated (either when FM/DFM is enabled in the OSC MOD section or when using Dual Sine Waveforms), the FM algorithm switch of the particular OSC will be activated.

You can choose from 5 different FM algorithms: Phase Modulation (like in DX7)

Logarithmic +

Logarithmic +/- Linear +

Linear +/-

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