Vult Knock

Knock is a modern take on a classic analog bass drum. It features a hybrid engine capable producing a wide variety of drum sounds. The Stress input allows for further shaping of the sound by using a vactrol model to control the envelope.

Knock is split in two sections: the oscillator and noise synthesizers. The oscillator section is analog modeled while the noise is a special oscillator capable of producing many kinds of clicking sounds.

Documentation

Oscillator section

• Tune (Knob): offsets by one octave up or down the tune of the drum. When no signal is connected to the Tune input the range goes from F0 to F2.
• Decay: defines how long the drum sound is.
• Bend: defines the initial pitch of the drum when simulating a hit.
• Time: defines how much time the pitch takes to move from the initial pitch to the actual pitch of the drum.
• Fury: changes the main oscillator wave and adds distortion to achieve a more aggressive sound.

Noise section

• Type: changes the kind of noise oscillator used.
• Depth: defines the level of the noise
• Shift: changes the perceived pitch of the noise

Modulation section

This section provides inputs and attenuverters to modulate the following parameters:

• Fury
• Decay
• Depth
• Shift

Inputs and Outputs

• Gate: a signal larger than 2.0 V will trigger the sound. In order to be re-triggered the signal needs to go below that threshold and up again.
• Tune: defines the pitch of the drum. The given value will be offset by the Tune Knob.
• Stress: this signal can be used to control the level of the sound. The control signal is passed to a Vactrol model that will soften the transitions and will provide a smoother sound. When a signal is connected 0.0 V corresponds to ~40% of the level. 10.0 V corresponds to 100% of the sound. Negative signals will reduce the level below the 40%.
• Out: main output of the module.

Extreme Mode

Knock has a toggle switch that will change the module to the extreme settings. In this mode, all the ranges of the parameters are expanded allowing for more aggressive sounds.