Aperture

$349.00

The Aperture is a variable-width bandpass filter with fast and tactile controls.  It is capable of simple filtering, self oscillation FM timbres, nasty acidic squelches, and capturing images of UFOs descending from the heavens on a cold winter’s night.  The concept is a bandpass that ranges from transparent to gnarly, with precision controls that behave under stress, all while being joyful to wreak havoc with. 


Features include:

  • Variable bandwidth via tactile and CV controls
  • Eight pole filter core
  • Independent resonance and self oscillation of both sides of the filter with CV
  • Feedback circuit with two modes and CV 
  • Input level VCA
  • Additional CV for opening the band either side of Center
  • V/oct tracking
  • Temperature compensated
  • Dry / Wet mix for parallel filtering sounds

Controls

*LEDs along the top indicate width and position of the filter

Knobs

Frequency: Controls the center frequency 
of the band

Width: Controls the width of the band. 

Freq CV: Attenuverter for the CV input for precise 
control over the Frequency of the filter.

HP Res: Controls the amount of resonance on the
High Pass side of the filter.

LP Res: Controls the amount of resonance on the
Low Pass side of the filter.

Input Level: Attenuates the input level.
Unity at 12o'clock, total gain of 6 dB
Feedback: Controls the amount of feedback for 
more self oscillation and squelchy behavior.

Dry/Wet Mix: You know what this means ;)

Width CV: Attenuverter for CV control 
over the width of the filter.

Jacks

1V/ Oct: The aperture’s cutoff frequency will track 
at 1V/oct. This is the input for that.

In LVL: Input for CV control over the input
level attenuation.

Freq: CV input for control over the cuttoff frequency.
Width: CV input for control over the width of the band.

FDBK: CV input for control over the feedback amount.

Input: This is where your audio signal you 
want to filter goes.

Output: This is where the filtered audio
signal comes out.

HPCV: CV input for independent control over the 
cutoff frequency on the high pass side of the filter.

LPCV: CV input for independent control over the 
cutoff frequency on the low pass side of the filter.

HP Res: CV input for control over the resonance on the 
high pass side of the filter.

LP Res: CV input for control over the resonance on the 
low pass side of the filter.

Other notable things

Current:
+12V = 120mA
-12V = 100mA
 
Depth: 25mm including power
Width: 12 HP
Height: 3U Eurorack
 
Input Gain: -90dB to +6dB
Nominal Input: 10Vpp
HPF Cutoff Freq Range: 0.5 Hz to 50kHz
LPF Cutoff Freq Range: 0.1Hz to 25kHz
Poles: 8