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Overview 

 
Paragraphs is a hi-fidelity device that applies an alternate structure 
to your sound. Through a smoothly evolving gradient of your 
instruments timbre, you will find new ways to re-animate your guitar, 
synthesizer, or drum machine.  
 
Plainly, Paragraphs is an analog four-pole resonant low pass filter 
with an attack, decay (AD) envelope generator designed with focus on 
simplicity and flexibility.  
 
Low Pass Filter 
The heart of the filter circuit is the AS3320 analog chip — a modern 
replica of the same component used in analog classics like the 
Sequential Prophet 5, Pro-One mono-synth, Elka Synthex, and the 
LinnDrum. Cutoff spans the full audio spectrum and resonance starts to 
self-oscillate at about seventy percent.  
 
Modulation 
The envelope generator offers modulations in an uncommonly wide range 
of frequencies — starting as low as 0.05 ​hz​ for slowly evolving 20 
second long cycles, and reaching up to (and past) the audio threshold 
at 300 ​hz​ for a wave shaping effect similar to sounds found on west 
coast style synthesizers (“think Buchla”).  
 
Flexible Gain Stages 
Paragraphs accepts instrument and line level signals. Dedicated 
controls for input (drive) and output level make it easy to move 
between a crystal clear clean tone and and a clipping fuzz. A 
multi-color LED provides a visual representation of the signal level. 
Red indicates clipping. Orange flashes indicate the start of overload. 
Green indicates the presence of signal at or below the nominal level. 
 
CV and MIDI 
Inputs for Control Voltage (CV) and midi are available to remotely 
trigger the envelope generator. This enables your Paragraphs to stay 
in rhythmic synchronization with external systems like midi 
sequencers, euroracks, and digital audio workstations. 

 

Summary of Contents for Paragraphs

Page 1: ...User Manual Version 1 1...

Page 2: ...ets 13 Change Log 17 Thank you for supporting Vongon We are a small operation based in Oakland California All products are assembled and tested with care and attention in our studio We catalogue audio...

Page 3: ...modulations in an uncommonly wide range of frequencies starting as low as 0 05 hz for slowly evolving 20 second long cycles and reaching up to and past the audio threshold at 300 hz for a wave shapin...

Page 4: ...Drive LED Signal level LED Three colors to indicate internal signal level red orange green 4 Rise Length of time it takes for the envelope generator to rise to maximum level 5 Fall Length of time it...

Page 5: ...cillate 12 Amount The amplitude of the modulation source or how much the cutoff is affected by the envelope generator 13 Cutoff Base cutoff frequency of the low pass filter 14a IN 1 4 mono audio input...

Page 6: ...Circuit Diagram 6...

Page 7: ...n the filter is in self oscillation the drive can be used to balance the input signal with the oscillation of the filter It can be fun to try playing a duet with the drone of the filter while it is se...

Page 8: ...ch other to determine the rate of the envelope Rise and fall have a range from 1 millisecond to 10 seconds Multiplier scales both the rise and fall time from x1 to x0 01 this can be used to change the...

Page 9: ...G is pressed and stays high until TRIG is released which causes the envelope to start falling Once will play only one cycle of the envelope waveform when the TRIG is pressed There are two envelope sha...

Page 10: ...dicates clipping Orange flashes indicate the start of overload Green indicates the presence of signal at or below the nominal level CV Control Voltage The CV connection is a voltage trigger that can b...

Page 11: ...on all midi channels 1 16 key numbers 0 127 and velocity values 0 127 The MIDI input is a 1 8 stereo jack that is wired for a Type B midi adapter If you are unsure what type of adapter to use you can...

Page 12: ...ded Warranty Vongon will repair or replace any malfunctioning product for a period of 1 year after purchase date Problems resulting from modifications or misuse may cancel this warranty The owner will...

Page 13: ...Presets You can hear these presets on our soundcloud playlist Name Comments Settings Smooth Sway Classic slow tremolo type sound Percussive Plucks Rhythmic driving fun 13...

Page 14: ...Rhythmic Plucks Use the once mode to trigger the envelopes with the TRIG switch Ramp Reverse tremolo sound 14...

Page 15: ...Slow Bloom Great for textural playing Tremolo to Ringmod Use the multiplier to sweep from tremolo into ring modulation 15...

Page 16: ...he filter notice on res can be mixed much higher without overpowering the input signal No Input Resonance Feedback Synth WARNING Turn down the output level this is LOUD Create try sweeping the amount...

Page 17: ...Change Log Version Changes 1 0 Initial commit 1 1 Added presets 17...

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