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PLAYING THE KEYBOARD 

 
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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. 

 
 
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USING THE POTS TO CONTROL PARAMETERS 

 
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The pots can be used to control 18 different parameters, a pair at a 
time.  
 
By 

pressing

 (not 

tapping

) the left and right buttons you can change 

which pair of parameters the pots control.  Each time a button is 

pressed

, its associated LED (red LED for left button, blue LED for 

right button) will change state (from OFF to ON to BLINKING, back to 
OFF etc.) 
 
Below is a chart showing which pair of parameters the pots control 
when the LEDs are in a given state: 
 
   red LED    blue LED         top POT                bottom POT 
   -------    --------   -------------------      ------------------- 
     OFF         OFF          echo WARP             echo DELAY time 
      ON         OFF        echo FEEDBACK          lead/echo BALANCE    
   BLINK         OFF        panning FREQ             panning DEPTH 
     OFF          ON        autowah FREQ             autowah DEPTH 
      ON          ON        autowah CUTOFF          echo PULSE WIDTH 
   BLINK          ON         [ reserved ]             [ reserved ]                
     OFF       BLINK       envelope ATTACK*          envelope DECAY*          
      ON       BLINK       envelope SUSTAIN*        envelope RELEASE* 
   BLINK       BLINK         echo SUSTIME            lead PORTAMENTO 
 
  * these pots can be configured via the Parameter Menu (see next  
    section) to control:  
     
     1) only the LEAD voices 
     2) only the ECHO voices  
     3) both the LEAD and ECHO voices

 

 

Содержание Quadrant

Страница 1: ...ly the FraraJaqua preset is omitted Audio Control Flow Diagram for the Quadrant Synth Tropes v Echotron v v v Lead 0 Mixer Lead 1 v v Audio out Lead 0 is duplicated in the opposite audio channel by Lead 1 which may be transposed and or detuned from Lead 0 The note information for Lead 0 is also fed into the Echotron At the same time a trope an arpeggiation pattern can be applied to the echoed note...

Страница 2: ...ecrease by an amount controlled by the FEEDBACK setting If FEEDBACK is set to its highest value 255 then the note will echo forever or until all the slots in the carousel have been used up and a new incoming note overwrites it Each time a note echoes its pitch can be raised or lowered by the current WARP FACTOR The number of slots in the carousel is configurable and can be set interactively via th...

Страница 3: ...tes currently echoing in the carousel and ISO TEMPO is on then the delay time will be 1 4 of what it would be if there were only 1 note in the carousel The Telepromt and Frara Jaqua presets use ISO TEMPO You can toggle ISO_TEMPO via the Parameter Menu see below ENVELOPE A master envelope dynamically controls the amplitude of the notes produced by the Echotron This envelope is a traditional ADSR At...

Страница 4: ... pots see below PAN CONTROL A PAN control dynamically rotates the note output in the stereo field The DEPTH and FREQ of the panning can be controlled via the pots see below Overview Diagram of the Echotron Now that we have covered each component here is an overall view HOLD notes in SAMPLE HOLD v WARP Trope in Note Carousel DELAY ISO TEMPO FEEDBACK SLOTS ENVELOPE notes out Attack Decay v Sustain S...

Страница 5: ... blue LED for right button will change state from OFF to ON to BLINKING back to OFF etc Below is a chart showing which pair of parameters the pots control when the LEDs are in a given state red LED blue LED top POT bottom POT OFF OFF echo WARP echo DELAY time ON OFF echo FEEDBACK lead echo BALANCE BLINK OFF panning FREQ panning DEPTH OFF ON autowah FREQ autowah DEPTH ON ON autowah CUTOFF echo PULS...

Страница 6: ...cally exited restoring the prior user interface state You can exit the Parameter Menu without modifying any parameters by double tapping the left button a second time The list below describes what actions are taken when a key is pressed Key Action C toggle Sample and Hold on off C turn Sample and Hold off and unhold all held notes D hold next note played D reserved E toggle lead voices on off F se...

Страница 7: ...ces off and should stay off D Farsy E Teleprompt lead voices off turn them on once 2 slots are playing F Glacial play very slowly G Blur A ToneJack B FraraJaqua lead voices off turn them on once 4 slots are playing FraraJaqua only available when compiled with build 1 6 6 Types of button presses Tap quickly tap a button Press long press a button Double Tap quickly double tap a button ...

Страница 8: ...square wave oscillators which can only be set to frequencies which have integral wavelengths The frequencies produced by these oscillators conform more closely to a scale in Harmonic Tuning than one in Equal Temperament But why does the C key play an F The short answer is that on the ArduTouch whose audio rate is 15 6 kHz F in octave 1 has a period of 360 samples 360 is a number favored by the anc...

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