Buffer
BPF 4
BPF 3
BPF 2
BPF 1
Summing
Amp
PEAK
Control Voltage
Processor
Size
Articulator X
Articulator Y
Audio IN
Audio OUT
Articulator Y CV IN
Articulator X CV IN
Size CV IN
Gain
The SIZE parameter moves all four BPFs in parallel,
maintaining their relative pitch relationships. This affects
the overall range of the vocal effect, from deep to high. It can
also produce WAA-WOW vowel sounds if manipulated
simultaneously with Articulator X and Y.
VOLTAGE CONTROL (CV INPUTS)
SIZE
ARTICULATOR X, Y
The Grendel Formant Filter has three control voltage (CV)
inputs. They are designed to give full range of control from
either a 0..5V input or -2.5 ... +2.5V input. Each CV input is
summed internally with its associated bias knob, located
directly to the right of the jack. When connecting a source
that ranges 0..5V, turn the bias knob fully counterclockwise.
Suggested signal sources for the CV inputs are LFO,
envelope generator, MIDI-CV converter, analog joystick
controller, envelope follower, sequencer, random voltage
generator, etc. Applying modulation of 100Hz or higher
frequency may cause unexpected jumps in volume.
Even if the CV inputs are not used, you can control all of the
Formant Filter parameters manually by tweaking the knobs.
Experiment with each articulator alone and in combination
to hear the range of vowel tones the Formant Filter is
capable of.
Articulator X and Y work together to select vowel tones from
a two-dimensional map. Many vowel sounds of the English
language are available. For optimum control, these inputs
can be connected to an analog joystick or two channels of a
MIDI-CV converter. The ideal voltage range for controlling
Articulator X and Y is +/- 2.5 volts, or 0..+5 volts.
The package includes 4 each of mounting screws (M3x6),
and a ribbon cable to connect the module with any standard
eurorack power supply.
The power connector on this module is keyed to prevent
accidentally inserting the plug backwards.
This module re12V at 55 mA, and -12V at 55 mA. It is
OK to use a +/- 15V supply.
In the unlikely event reverse polarity power is applied, the
protection circuit in this module will appear as a short circuit
to your power supply.
Format ……….......................... 12 HP eurorack
Size ……............. 60.6 mm (W) x 128.5 mm (H)
Depth required behind panel .................. 30 mm
Power source ..........…. +/-12VDC or +/-15VDC
Current consumption ................ 55mA each rail
Reverse polarity protection …….................. Yes
Audio
Connectors ......... 3.5 mm mono (unbalanced)
Input impedance …........... 33 k
, AC coupled
Output impedance ……........................… 1 k
Audio gain range …….................. -
∞
to. 0 dB
Dynamic Range ..................................... 80 dB
CV Inputs
CV input range ..............… +/-2.5V or 0..+5V
Input impedance .................................. 20 k
Mass (not incl cables) ................
99 g (3.5 oz)
Technology …............... analog surface mount
SPECIFICATIONS
INSTALLATION AND POWER SUPPLY
c
2022 Rare Waves LLC
Texas, United States
LPF
160 Hz
MODE
Switch
Buffer
