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CORNFIELD ELECTRONICS Quadrant Manual

A partly echoing, partly arpeggiating, possibly warped synth for the ardutouch.
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Quadrant 
 
A partly echoing, partly arpeggiating, possibly warped synth for the ArduTouch.
**********************************************************************
IT IS RECOMMENDED THAT YOU USE ARDUINO VERSION 1.6.6.
Then uncomment the "#define BUILD_166" line in Model.h of the library.
Some features and/or presets may be omitted if BUILD_166 is not used.
(In this version of Quadrant all features are present, and only the
"FraraJaqua" preset is omitted.)
********************************************************************** 
==== Audio/Control Flow Diagram for the Quadrant Synth ====
------------
|
------------
.----------->
|
|
|------------------|-----|------------------.
|
|
------------
|
Lead 0
------------
Lead 0 is duplicated in the opposite audio channel by Lead 1 (which
may be transposed and/or detuned from Lead 0).
for Lead 0 is also fed into the Echotron.
(an arpeggiation pattern) can be applied to the echoed note.
output from the Echotron is internally panned in stereo and then fed
into a mixer along with the audio output from Lead 0 and Lead 1.
 
Tropes
| --------.
----------------
|
----------------
---------------
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--->
|
---------------
[ Audio out ]
|
|
v
Echotron
|
|
|
|
|
v
v
Mixer
|
<---
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|
|
|
v
v
At the same time, a "trope"
1 
|
v
------------
|
Lead 1
|
------------
The note information
The

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Summary of Contents for CORNFIELD ELECTRONICS Quadrant

  • Page 1 Then uncomment the "#define BUILD_166" line in Model.h of the library. Some features and/or presets may be omitted if BUILD_166 is not used. (In this version of Quadrant all features are present, and only the "FraraJaqua" preset is omitted.) ********************************************************************** ...
  • Page 2 ==== The Echotron Unit ==== The Echotron is a stereo synthesizer in its own right. At the heart of the Echotron is a carousel of "slots", each of which holds an instance of an echoing note: --------------------------------------- <--- WARP FACTOR Note Carousel <--- DELAY TIME Slot 0 <...
  • Page 3 ----- Note HOLD ------ You can instruct the Echotron to HOLD the next note played (see the Parameter Menu below). When a note is on HOLD it will not decrease in volume as it echoes, and it will not be overwritten by incoming notes when the carousel is full.
  • Page 4 ----- AUTO-WAH ------ The Echotron has a pair of internal autowahs (oscillating low-pass filters) which are applied to the note output before it is panned. Three parameters control the autowah behaviour: CUTOFF frequency, oscillation FREQ, and oscillation DEPTH. All of these can be modified via the pots (see below).

  • Page 5: Playing The Keyboard

    ---------------------------------------------------------------------- PLAYING THE KEYBOARD ---------------------------------------------------------------------- The Quadrant keyboard is a mono-touch instrument: you can play one note at a time. To raise the keyboard by an octave, tap the right button once. To lower the keyboard by an octave, tap the left button once.
  • Page 6 ---------------------------------------------------------------------- USING THE PARAMETER MENU ---------------------------------------------------------------------- You can control additional parameters by using the Parameter Menu. To access the Parameter Menu double-tap the left button. The LEDs will now start blinking on and off in alternation: this tells you that the Parameter Menu is active.
  • Page 7 ---------------------------------------------------------------------- GUIDE TO QUADRANT’S PRESETS ---------------------------------------------------------------------- Load presets by double-tapping the right button and then pressing any "white" key. The presets are as follows: Name Performance Notes ---- ------------------------------------------------- Scaffold lead voices off (and should stay off) Farsy Teleprompt lead voices off (turn them on once 2 slots are...
  • Page 8 Low 'F', so to speak, is the natural tonic frequency of the ArduTouch.* Since Quadrant's tuning is only an approximation to an 'F' Harmonic tuning, certain musical scales (such as E Major, F# Major on the ArduTouch keyboard) will sound a bit sour.