Analogue Filter Unit

The Xone:VF-1 is a high quality, 1U rack analogue filter unit equipped with a wide range of input and output connectors, which features an enhanced version of the legendary Xone Filter circuits.

Live Perfomance

The VF-1 is designed with live performance in mind. It offers the artist control over the music and the creative experience. The valve overdrive option gives the “dirty” sound to bass and synthesized sounds giving added depth and “fattening” of the sound. The filters can be linked to another VF-1 for control of both VF-1 units by one control as well as the ability to link VF-1's to a Xone:92 and control the VF-1 filters from the Xone:92. As well as the valve overdrive there is an envelope follower giving added effects to a live performance. LFO is also included for an automated response of the filter cutoff, and many filter types are included. Superior sounding Filters associated with valve analogue circuits (e.g warmth, clarity and depth) with the features and control of digital equipment.

In the Studio

The VF-1 is an ideal addition for the studio, be it project or professional. The Filters can be used to remove unwanted sounds (e.g. low frequency rumble) or as an effects processor with tube (valve) front end for added warmth. MIDI implementation means that filter sweeps can be recorded and replayed from a sequencer. The VF-1 can be controlled from external MIDI equipment and can also manipulate MIDI equipment, offering exceptional flexibility from an analogue filter.

Filters

Three different filter types are provided: high-pass, band-pass and low-pass, which can be selected together to create further types - for example, high-pass and low-pass together create a notch filter. All of the filter controls are “soft switched” to prevent clicks, allowing them to be changed on the fly

Resonance

This control allows the sharpness of the filter to be adjusted from a gentle roll-off for a subtle filter sound, to near oscillation at maximum. Automatic Resonance Control (ARC) monitors the output of the filter and automatically reduces the resonant peaks of high signal levels, thus minimising potentially system-damaging transients.

Mono/Stereo

The filter can be configured as a stereo 2-pole (12dB/octave) or a mono 4-pole (24dB/octave) by selecting the Mono switch on the rear panel, without the need to re-patch

Invert Filter

Another rear panel switch sums the inverted filter signal with the non-filtered input signal and routes the remainder to the TRS jack outputs; this can give some unusual and subtle sounds, especially if routed to an effects unit.

Valve

As well as the VCA filter the VF-1 also has a valve (tube) input stage with drive control, allowing the signal level through the valve to be progressively increased in order to create strong second harmonics, or taken all the way into clipping. This is a great tool for adding warmth to a mix or for fattening up thin, reedy bass sounds. Automatic gain reduction circuitry maintains a near constant output level as the overdrive control is increased

Envelope Follower

This function with switchable release speed, allows the filter cut-off frequency to be modulated by the intensity of the input signal, and can be used to create some interesting effects with drum loops and bass lines. It can also be switched into the valve overdrive circuits to give intensity modulated overdrive

LFO

The low frequency oscillator with square/triangle waveforms completes the modulation toolbox for the filter system

MIDI

The VF-1 can send and receive MIDI, allowing the filter frequency, filter type, and on/off status to be remotely controlled or saved to a sequencer. It can be configured to operate in several different modes; for instance, to allow it to interface to our MIDI equipped XONE:92 DJ mixer, and another to track the filters to MIDI notes