The Filter Or Vcf - Arturia TAE ORIGIN User Manual

- The [JoyMixer], this mixer sets the volume of the four oscillators' outputs (or any other
audio sources). The mix is done with a joystick which moves between four points within a
diamond shape. Each point (A, B, C or D) corresponds to the maximum volume of each
oscillator. The [Joymixer] can also be automated by a four parameter envelope or by
other modulation sources which can be connected in the modulation matrix.

11.1.3 The filter or VCF

The audio signal generated by an oscillator (the waveform) is next generally directed to a filter
module or VCF (Voltage Controlled Filter). It is this module that we use to control the sound by
filtering (by removing or subtracting certain frequencies, which explains the name given to this type
of synthesis) the harmonics situated around a cut-off frequency. It can be considered to be a
sophisticated equalizer that reduces, depending on the filter type, the high or low frequencies of a
sound.
The removal of undesirable frequencies at the cut-off frequency is not done suddenly but
progressively, depending on the filtering slope. This filtering slope is expressed in decibels per
octave (or dB/Oct). The filters used in classic analog synthesizers have 24 dB/Oct or 12 dB/Oct
slopes.
Origin gives you access to several types of filtering: 6, 12 and 24 dB/Oct slopes.
The removal of undesirable frequencies at the cut-off frequency
ARTURIA – ORIGIN – USER'S MANUAL
The Minimixer on Origin
The JoyMixer on Origin
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