Voltage Controlled Filter (VCF)

VCF Frequency Slider (Green)

Arguably the most commonly used parameter on any synth, this changes timbre by subtracting frequencies and harmonics when progressively moving the slider downwards from its top position.

VCF Resonance Slider (Green)

Adds emphasis at the cutoff point and causes the filter to ‘self-oscillate’ when pushed towards the top of its range.

KYBD / S/H Amount slider (Yellow)

When the “Random S/H” switch is set to OFF, the yellow slider allows you to vary the keyboard tracking as it relates to the filter.

When the Random S/H switch is ON, the yellow slider controls the level of Sample and Hold modulation going into the filter. Sample and hold runs in accordance to the LFO rate and samples the noise generator for random results.

The Random S/H switch is in the top left of the main Axxess panel.

LFO Sine Wave Amount slider (Pink)

Apply a sine wave to the filter cutoff and modulate it at a speed determined by the LFO Frequency.

ADSR Amount Slider (Red)

Axxess has an ADSR Envelope Generator that can be used to shape the VCF and the VCA. Here it’s possible to assign it to the VCF (cutoff) and use the red slider to feed varying amounts of the envelope generator to the filter cutoff.

Velocity Slider (Purple)

Keyboard velocity can be assigned to the VCF and the VCA. Here we can adjust the amount by which the keyboard velocity with affect the VCF cutoff.