dj-mp3-sourcer

name

dj-mp3-sourcer

description

Download music from links (YouTube, Spotify, etc.) by finding the best available source. Searches across platforms in priority order: Bandcamp, Beatport, Amazon Music, Spotify (via spotdl), YouTube (via yt-dlp). Use when a user sends music links and wants high-quality audio files downloaded, or when batch-downloading tracks from mixed sources. Handles single tracks or batch lists. Surfaces purchase links for paid platforms, downloads directly from free sources. Default output is MP3 320k. Supports a "free only" mode that skips paid platforms entirely.

DJ MP3 Sourcer

DJ-oriented music downloading skill. Takes any music link and finds the best available source, prioritizing extended mixes and MP3 320k output.

⚠️ Legal Notice: This skill is intended for downloading music you have the right to access — purchases, free releases, creative commons, etc. Respect copyright laws in your jurisdiction. The author is not responsible for misuse.

Dependencies

pip install yt-dlp spotdl
brew install ffmpeg  # needed by yt-dlp for audio extraction

# optional
pip install bandcamp-dl  # for free bandcamp downloads

Source Priority

Search in this order — stop at the first match:

1. Bandcamp — supports artists directly, often has extended mixes
2. Beatport — DJ-standard, has BPM/key metadata, extended mixes
3. Amazon Music — digital purchase option
4. Spotify (via spotdl) — good metadata/tagging, 320k MP3
5. YouTube (via yt-dlp) — fallback, always works

For paid sources (bandcamp, beatport, amazon), surface the purchase link with price. For free sources, download directly.

If free only mode is enabled, skip steps 1-3 and go straight to spotdl → yt-dlp.

Core Rule: Prefer Extended Mixes

Always prefer the extended mix over radio edits. An extended mix from a lower-priority source beats a radio edit from a higher-priority one.

Example: extended mix on YouTube > radio edit on Spotify.

When searching, append "extended mix" to queries. If only a radio edit exists, note it in the output.

Workflow

1. Identify the track — extract artist + title:

   yt-dlp --dump-json "<url>" | jq '{title, artist: .artist // .uploader, duration}'
   

2. Search each source using web_search:

   "<artist> <title> extended mix site:bandcamp.com"
   "<artist> <title> extended mix site:beatport.com"
   "<artist> <title> site:amazon.com/music"
   

3. Download or link — free sources download; paid sources return purchase URL with price
4. Tag the file — artist, title, album, cover art. Note BPM/key if available from beatport.

Download Commands

spotdl

spotdl download "<spotify-url>" --output "{artist} - {title}" --format mp3 --bitrate 320k

yt-dlp

yt-dlp -x --audio-format mp3 --audio-quality 0 \
  --embed-thumbnail --add-metadata \
  --metadata-from-title "%(artist)s - %(title)s" \
  -o "%(artist)s - %(title)s.%(ext)s" "<url>"

Post-Download: Filename Normalization

yt-dlp filenames are often messy (NA - prefixes, (Official Video) suffixes, label names, wrong artist credits). Always run the normalization script after downloads complete.

Usage:

# 1. Write the tracklist as JSON (from the parsed tracklist in step 2)
cat > /tmp/tracklist.json << 'EOF'
[{"artist": "Karol G", "title": "Ivonny Bonita"}, {"artist": "Doja Cat", "title": "Woman (Never Dull's Disco Rework)"}]
EOF

# 2. Run the normalize script
scripts/normalize-filenames.sh ~/Downloads/set-name /tmp/tracklist.json

The script fuzzy-matches each mp3 in the directory to a tracklist entry and renames to clean Artist - Title.mp3 format. Unmatched files are left untouched.

The tracklist is the source of truth for filenames, not YouTube metadata.

Configuration

Setting	Default	Notes
Output directory	~/Downloads/	Where files are saved (subfolder per set when used with dj-set-ripper)
Format	mp3 320k	High-bitrate MP3; configurable to flac if needed
Extended mix	always	Prefer extended/original mix over radio edit
Free only	false	When true, skip paid sources (bandcamp, beatport, amazon) — only use spotdl and yt-dlp

Batch Processing

When given multiple links, process in parallel using sub-agents (sessions_spawn). Report results as each track completes.

Edge Cases

• DJ mixes / long sets — download via yt-dlp directly, skip source searching
• Unavailable tracks — report clearly, suggest alternatives if found
• Region-locked content — note restriction, try alternative sources
• Remix vs original — if the link is a specific remix, search for that exact remix, not the original