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wmd
aperture

price : $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 winterís 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
*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 apertureís 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




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