mix-id

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Identify every track in a DJ mix — from a file or URL. Outputs TXT, CUE, and JSON tracklists.

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# mix-id

Identify every track in a DJ mix — from a local file or streaming URL.

Drop in a Mixcloud, SoundCloud, or YouTube link and get a full tracklist in seconds.

```
$ npx mix-id https://www.mixcloud.com/dj/my-set

📥 Downloading...
✅ my-set.mp3 (142.3 MB)

🎵 mix-id
──────────────────────────────────────────────────
File:     my-set.mp3
Duration: 1:30:12
Settings: 30s step, 18s sample
──────────────────────────────────────────────────

[00:00] 1% ✅ The Orb — Little Fluffy Clouds
[00:30] 1% ↩️  The Orb — Little Fluffy Clouds
[01:00] 2% ✅ Surface — Falling in Love
...

──────────────────────────────────────────────────
🎧 TRACKLIST — my-set.mp3
──────────────────────────────────────────────────
 1. [00:00] The Orb — Little Fluffy Clouds
 2. [01:00] Surface — Falling in Love
 3. [04:30] Madonna — Vogue
──────────────────────────────────────────────────

💾 Output:
   my-set_tracklist.txt
   my-set.cue
   my-set_tracklist.json
```

## Install

```bash
npm install -g mix-id
```

Or run directly (no install needed):

```bash
npx mix-id my-mix.mp3
```

### Dependencies

- **Node.js** 18+
- **ffmpeg** — audio processing
- **yt-dlp** — URL downloads (only needed for URLs)

On macOS, mix-id will **auto-install** ffmpeg and yt-dlp via Homebrew if they're missing. On Linux, install them manually with your package manager.

## Usage

```bash
# Local file
mix-id my-mix.mp3

# SoundCloud
mix-id https://soundcloud.com/dj/set-name

# Mixcloud
mix-id https://www.mixcloud.com/dj/show-name

# YouTube
mix-id https://www.youtube.com/watch?v=...

# Custom scan settings
mix-id my-mix.mp3 --step 30 --segment 20

# Resume from a specific position
mix-id my-mix.mp3 --start 3600
```

## Options

| Flag | Default | Description |
|------|---------|-------------|
| `--step` | auto | Seconds between scan points (30s for mixes ≤1hr, 60s for longer) |
| `--segment` | `18` | Sample length for recognition |
| `--start` | `0` | Skip to this position (seconds) |
| `--help` | | Show help |

### Smart step scaling

mix-id automatically adjusts scan resolution based on mix length:

- **≤1 hour** → 30s steps (~120 requests, more precise timestamps)
- **>1 hour** → 60s steps (~60-150 requests, avoids rate limits)

Override with `--step` if you want full control.

## Output

mix-id generates three files:

- **`_tracklist.txt`** — Paste-friendly format for Mixcloud, etc.
- **`.cue`** — CUE sheet with track markers and timestamps
- **`_tracklist.json`** — Structured data with full metadata

## How it works

1. Downloads audio from URL (if given) using yt-dlp
2. Splits the audio into overlapping segments
3. Fingerprints each segment via Shazam's recognition API
4. Deduplicates consecutive matches (handles DJ transitions)
5. Outputs clean tracklist in multiple formats

## Supported sources

Any URL that [yt-dlp](https://github.com/yt-dlp/yt-dlp) supports — that's **1000+ sites** including:

- SoundCloud
- Mixcloud
- YouTube
- Bandcamp
- And many more

Plus any local audio file (mp3, wav, flac, m4a, etc.)

## Tips

- **No API key needed.** mix-id uses Shazam's public recognition endpoint.
- **Transitions fuzzy?** Shazam sometimes bounces between two tracks during a mix. mix-id deduplicates these automatically.
- **Rate limited?** mix-id retries automatically with exponential backoff (10s → 20s → 40s). If you're scanning back-to-back, switch VPN/network for a fresh IP.
- **Resume a scan:** If a scan was interrupted, use `--start` to pick up where you left off (in seconds).
- **Want more precision?** Use `--step 30` on longer mixes, but be aware of potential rate limiting.

## License

MIT

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