let harmony = Engine.new(Palestrina);
fn detect_pitch(buf) -> Note
const MAX_VOICES: usize = 4;
voice_leading.reject_parallels()
struct GuitarInput { onset }
engine.harmonize(note, scale)
fn detect_pitch(
  buf: &[f32]
) -> Option<Note>
let voices =
  counterpoint::
    generate(line, mode);
if interval == Fifth
  && motion == Parallel
  { reject() }
#[inline(always)]
fn onset(
  frame: &Frame
) -> bool
block_size: 128
sample_rate: 48_000
latency_ms: 7.2
// Palestrina
// counterpoint
// rules.rs
CONTRAPUNK WEEKEND JAM·WK 01·Koji Kondo· STARTS IN 2DAYS→ /jam
COMMUNITY · MIT · GITHUB

MADE TOGETHER.

Guitarists, theorists, DSP engineers, and bedroom producers. Read the code, open an issue, send a PR.

"

The Jazz mode voicings are better than I am. I mean that as a compliment to the code.

KE
@kenji_osaka
JAZZ GUITARIST
"

I make my species-counterpoint students check their homework against Palestrina mode. Beats my red pen.

LE
@lena.strings
COMPOSITION PROF
"

Random-below-no-2nds into a Rhodes plugin hosted in-app. Instant ECM record.

DR
@drifter_7
AMBIENT PRODUCER
"

Looked under the hood expecting hacks. Found a voice-leading solver with comments. Read the whole thing on a flight.

BO
@boris.k
DSP ENGINEER
"

We run two guitars into two instances, quantize to different modes. Feels like a third band member.

SU
@sunday_kids
POST-ROCK BAND
"

Parallel-fifths rejection on by default is a value statement. Ship more value statements.

MA
@mara.note
MUSIC THEORIST
◆ ◇ ◆ ◇ ◆ RECENT COMMITS 
feat(modes): add RandomBelowNoSeconds — avoid minor/major 2nd intervals
feat(host): CLAP plugin GUI window wiring via clack-host
perf(pitch): McLeod refinement drops jitter by 0.4ms
fix(solver): clamp voice-cross penalty when voices tie
feat(styles): Bach Chorale preset + unit tests on 4-voice cadences
docs: engine deep-dive — 57 scales across 10 families
fix(wasm): Web Audio worklet timing on Safari
chore: tauri v2 upgrade, drop v1 migration shims
GET CONTRAPUNK

THREE WAYS IN.
ALL FREE.

Browser at app.contrapunk.com. macOS DMG from GitHub Releases. Build from source with cargo tauri dev.

OPEN IN BROWSER → SOURCE · GITHUB