View source for SLOrk/Instruments/Intervalis

== Description ==

This instrument play intervals. The tilting of the laptop controls the intensity of each note (tilting front or back play the root note and tilting to the sides play the "interval" note). The sound is played trough a LeSLOrklie speaker (it rotates around the Hemi at an adjustable spin frequency).

== Usage ==

=== Installation ===
* Copy the file [[#ChucK Code|intervalis.ck]] to any folder you like
* Done!

=== Running ===
* Using a terminal go to the folder were "intervalis.ck" is located
* On the terminal window type: ''(replace N with the number of output channels of the audio card)'' <pre>chuck -cN intervalis</pre>
* Play!

==== Optional Arguments ====
Optionally you can type the following to run Intervalis:
<pre>chuck -cN intervalis:arg1:arg2:arg3:arg4</pre>
Where:
* ''arg1'': intial spining frequency [Hz]
* ''arg2'': spining frequency increment/decrement step [Hz]
* ''arg3'': side tilt mode (1 => vibrato; 0 => interval) [Boolean]
* ''arg4'': number of channels to implement the SLOrklie [int]
'''''This list of parameters may vary in the future'''''


=== Execution ===

# Select the root note by using 2nd and 3rd rows of the keyboard (from Tab & CAPS to ] & RETURN). See [[#Root note selection|root note selection]] for details
# Select interval using the numbers (1 to 8)
# Play notes by tilting the laptop
# Optional:
#* adjust timbre ([[#Other control keys|detail]])
#* adjust spin frequency ([[#Other control keys|detail]])
#* change register ([[#Other control keys|detail]])
#* detune the instrument ([[#Other control keys|detail]])
#* mute one or both notes ([[#Mute keys|detail]])

==== Key mapping ====

===== Root note selection =====

{|style="color:green; background-color:#eeeeee;" cellpadding="5" cellspacing="0" border="1"
|F4#||G4||G4#||A4|| A4#|| B4|| C5|| C5#|| D5|| D5#|| E5|| F5|| F5#|| G5|| G5#|| A5|| A5#|| B5|| C6|| C6#|| D6|| D6#|| E6 
|-
|TAB||CAPS||Q||A||W ||S ||D ||R ||F ||T ||G ||H ||U ||J ||I ||K ||O ||L ||; ||[ ||' ||] ||RETURN |
|}

===== Interval selection =====
* To select the interval name use the number keys from 1 to 8.
* To select the quality of the interval:
** M : Major/Perfect
** N : Minor/Tritone
* To specify the direction of the interval:
** - : Descending
** = : Ascending (default)

===== Other control keys =====

{|style="color:green; background-color:#eeeeee;" cellpadding="5" cellspacing="0" border="1"
!Parameter!!Decrease!!Increase
|-
|Register||,||.
|-
|Detune||9||0
|-
|Spin frequency||Arrow Left||Arrow Right
|-
|Number of harmonics (timber)||Arrow Down||Arrow Up
|}

===== Mute keys =====

{|style="color:green; background-color:#eeeeee;" cellpadding="5" cellspacing="0" border="1"
!Key!!Mutes ...
|-
|SPACE BAR|| Both notes
|-
|Left SHIFT|| Root note
|-
|Right SHIFT|| Interval note
|}