xattr -cr Nightingale.app

git clone https://github.com/rzru/nightingale
cd nightingale

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Outputs a `.tar.gz` (Linux/macOS) or `.zip` (Windows) ready for distribution.

---

./nightingale --setup

{
  "music_folder": "/home/user/Music",
  "separator": "uvr",
  "guide_vocal_volume": 0.3,
  "background_theme": "plasma",
  "video_flavor": "nature",
  "default_profile": "Alice"
}

{
  "profiles": [
    {
      "name": "Alice",
      "scores": {
        "blake3_hash_of_song": {
          "stars": 4,
          "score": 87250,
          "played_at": "2026-03-18T21:00:00Z"
        }
      }
    }
  ]
}

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The release script (`make-release.sh`) sources `.env` automatically.

---

~/.nightingale/
├── cache/              # Per-song stems, transcripts, lyrics (keyed by blake3 hash)
├── config.json         # App settings
├── profiles.json       # Player profiles and per-song scores
├── videos/             # Pre-downloaded Pixabay video backgrounds
├── sounds/             # Sound effects
├── vendor/
│   ├── ffmpeg          # ffmpeg binary
│   ├── uv              # uv binary
│   ├── python/         # Python 3.10
│   ├── venv/           # ML virtualenv (WhisperX, Demucs, audio-separator)
│   ├── analyzer/       # Python analyzer scripts
│   └── .ready          # Bootstrap completion marker
└── models/
    ├── torch/          # Demucs model weights
    ├── huggingface/    # WhisperX large-v3 weights
    └── audio_separator/ # UVR Karaoke ONNX model

Audio/Video file
       │
       ▼
 UVR Karaoke (ONNX) or Demucs (PyTorch)
       │  vocals.ogg + instrumental.ogg
       ▼
 LRCLIB API  ──▶  Synced lyrics fetch (if available)
       │
       ▼
 WhisperX large-v3  ──▶  Transcription + word-level timestamps
       │
       ▼
 Bevy App (Rust)
   - Plays instrumental audio
   - Synchronized word highlighting
   - Real-time pitch detection & scoring
   - GPU shader / video backgrounds
   - Scoreboards per profile

// In your Bevy plugin, register a new background variant
use bevy::prelude::*;

#[derive(Component)]
pub struct MyCustomBackground;

pub fn spawn_custom_background(mut commands: Commands) {
    commands.spawn((
        MyCustomBackground,
        // ... your background components
    ));
}

pub struct CustomBackgroundPlugin;

impl Plugin for CustomBackgroundPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(OnEnter(AppState::Playing), spawn_custom_background);
    }
}

use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct NightingaleConfig {
    pub music_folder: String,
    #[serde(default = "default_separator")]
    pub separator: StemSeparator,
    #[serde(default = "default_guide_volume")]
    pub guide_vocal_volume: f32,
}

#[derive(Debug, Clone, Serialize, Deserialize, Default)]
#[serde(rename_all = "lowercase")]
pub enum StemSeparator {
    #[default]
    Uvr,
    Demucs,
}

fn default_guide_volume() -> f32 { 0.3 }
fn default_separator() -> StemSeparator { StemSeparator::Uvr }

// Load config
fn load_config() -> NightingaleConfig {
    let path = dirs::home_dir()
        .unwrap()
        .join(".nightingale/config.json");
    let raw = std::fs::read_to_string(&path).unwrap_or_default();
    serde_json::from_str(&raw).unwrap_or_default()
}

use std::fs;
use std::path::PathBuf;

/// Remove cached stems/transcript for a song to force re-analysis
fn invalidate_song_cache(song_hash: &str) {
    let cache_dir = dirs::home_dir()
        .unwrap()
        .join(".nightingale/cache")
        .join(song_hash);

    if cache_dir.exists() {
        fs::remove_dir_all(&cache_dir)
            .expect("Failed to remove cache directory");
        println!("Cache invalidated for {}", song_hash);
    }
}

use blake3::Hasher;
use std::fs::File;
use std::io::{BufReader, Read};

fn hash_file(path: &std::path::Path) -> String {
    let file = File::open(path).expect("Cannot open file");
    let mut reader = BufReader::new(file);
    let mut hasher = Hasher::new();
    let mut buf = [0u8; 65536];
    loop {
        let n = reader.read(&mut buf).unwrap();
        if n == 0 { break; }
        hasher.update(&buf[..n]);
    }
    hasher.finalize().to_hex().to_string()
}

use serde::{Deserialize, Serialize};
use std::collections::HashMap;

#[derive(Debug, Serialize, Deserialize)]
pub struct SongScore {
    pub stars: u8,
    pub score: u32,
    pub played_at: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct Profile {
    pub name: String,
    pub scores: HashMap<String, SongScore>, // key = blake3 hash
}

fn update_score(profile: &mut Profile, song_hash: &str, stars: u8, score: u32) {
    profile.scores.insert(song_hash.to_string(), SongScore {
        stars,
        score,
        played_at: chrono::Utc::now().to_rfc3339(),
    });
}

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xattr -cr Nightingale.app

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Then re-open the song in Nightingale to re-analyze.

sudo apt install libasound2-dev libudev-dev libwayland-dev libxkbcommon-dev

rustup target add aarch64-unknown-linux-gnu
cargo build --release --target aarch64-unknown-linux-gnu