A live coding music library/environment for Kotlin. For software developers who want to dive into live coding music.
"Punkt" is "point" in Polish.
Demos:
- minimal - just a sequencer playing samples and synths designed in SuperCollider
- easy to install - a library + template project, just
git clone, run and enjoy - no custom IDE - could be started directly from IntelliJ IDEA or command line with any Kotlin-aware editor
- data-oriented - patterns and melodies represented as data structure, making it easy to test and visualize
- Install SuperCollider (at least 3.10) and sc3-plugins
- Clone template project
git clone https://github.com/pjagielski/punkt-template.git - Start SuperCollider, boot server (Server->Boot Server) and run punkt-synths.scd
(in case of "Memory allocation problems": clone punkt project and run
src/main/resources/punkt.scdin SuperCollider.) - Run
Main.ktinpunkt-template - Profit! Just edit
src/main/kotlin/live.ktsin your favourite editor for live-coding
- statically typed, compiled - you get code completion and compile-time errors for free
- sequence API - great standard library with lazy immutable sequences for making patterns
- DSL builders - extension methods and operator overloading makes it easy to create powerful DSLs
- scripting - a file watcher and API for compiling/evaluating script whenever it changes
- coroutines - makes trivial to trigger an asynchronous event from anywhere in your code
- mainstream - it's great to learn Clojure or Haskell, but it's even better that your project uses technology that reaches lots of potential users ;)
patterns(beats = 8) {
+ repeat(1).sample("bd_haus")
}Plays "bd_haus" sample every beat.
What happened here? punkt highly relies on durations to create patterns. If we want to play "bd_haus" sample every
beat, we could specify this by a list of beats, like listOf(0, 1, 2, 3, ...). We could use rangeTo function (e.g. 0..7) to
create a fixed range of beats. In punkt instead, you specify the durations between the beats, and a
starting point - which defaults to 0 by this repeat function (which is not repeat from Kotlin standard library).
This has some advantages:
- in simple cases, you repeat single value or cycle through small series of values
- this creates infinite sequence of beats, which is helpful if you don't know upfront how many beats you need ;)
that's why we need to narrow the resulting collection to fixes number of beats with this
patterns(beats = 8) {..}function.
Another example: 4 on the floor beat:
patterns(beats = 8) {
+ repeat(1).sample("bd_haus") // every beat starting from 0
+ repeat(2).sample("claps", at = 1.0) // every even beat, starting from 1
+ repeat(1).sample("hat_2", at = 0.5, amp = 0.5f) // every beat, starting from 0.5
}Evaluates to:
| sample | played at beats |
|---|---|
| "bd_haus" | [0,1,2,3,4,5,6,7] |
| "claps" | [1,3,5,7] |
| "hat_2" | [0.5,1.5,2.5,3.5,4.5,5.5,6.5] |
punkt also uses similar technique to create melodies. But melodies, apart from time when the sound should play,
require a note (pitch), which should play. To make it more musically correct, these notes should be part
of some musical scale. That's why we start by creating a scale object using DSL from scale package:
val scale = Scale(C.sharp(), minor)The notes of C# minor are: C#,D#,E,F#,G#,A,B (https://en.wikipedia.org/wiki/C-sharp_minor)
Then we can use phrase function, which takes sequence of degrees of given scale and sequence of durations to create a melody:
patterns(beats = 8) {
+ scale.low()
.phrase(
degrees(listOf(0,-4,-2,-1).flatMap { listOf(it,it,it) }),
cycle(0.75, 0.75, 0.5))
.synth("tr808", amp = 0.2f)
}This creates following notes:
| beats | note | degree |
|---|---|---|
| 0, 0.75, 1.5 | C# | 0 |
| 2, 2.75, 3.5 | F# | -4 |
| 4, 4.75, 5.5 | A | -2 |
| 6, 6.75, 7.5 | B | -1 |
Which is the "Shape of you" bassline ;)
TB-303 pentatonic arpeggio with LFO
val pentatonic = Scale(C.sharp(), pentatonic)
val lfo = LFO(1000, 3200, length = 1.5)
patterns(beats = 8) {
+ pentatonic.low()
.phrase(degrees(cycle(cycle((0..4)).take(10).toList())), cycle(0.25))
.synth("tb303", amp = 0.2f)
.params("sus" to 0.3, "dec" to 0.2, "start" to 100)
.params("cutoff" to lfo)
}4-step chord progression with lead synth
val scale = Scale(C.sharp(), minor)
val progression = listOf(Chord.I, Chord.IV, Chord.VI, Chord.VII)
patterns(beats = 8) {
+ scale
.phrase(
progression.flatMap { listOf(it, null, it) }.toDegrees(),
cycle(1.0, 0.25, 0.75)
)
.synth("lead", amp = 0.25f)
.params("cutoff" to 1500)
}- ORCΛ - simplicity (just a sequencer)
- openRNDR - kotlin script-driven live coding
- Leipzig - music as data
- FoxDot - synth design, OSC implementation
- Tidal - patterns, SuperDirt
- Sonic-Pi - live loops, script-driven live coding
- introduced separate tracks with global effects
- new global effects:
reverb,delay,djf - new effects:
djf,waveDist,squiz - new synths:
piano,bass8 - new note methods:
amp,track - fluent API for effects
- introduced effects
- new effects:
lpf,hpf,delay,dist,chop - new synth:
lead - BREAKING: synth params API cleanup
- events logging
- initial version ;)
sampleandloopsupport- new synths:
tb303,tr808,plucklead,da-funk
- OSC/MIDI out
- OSC/MIDI in
add effects on separate channels(0.3.0)- pattern randomization
- visualization
Copyright © 2020- Piotr Jagielski
Punkt is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.
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