While there is no official single "mp3 download link" for the full concert, you can find the official audio and video for L'Arc-en-Ciel's 20th L'Anniversary
: Focused on their earlier years, featuring classic tracks like "Dune," "Blurry Eyes," and "Flower". l27arc en ciel 20th anniversary mp3 download link
Where to Legally Download or Stream L'Arc~en~Ciel 20th Anniversary Music While there is no official single "mp3 download
Individual Days: Both Day 1 and Day 2 are available as standalone DVD/Blu-ray releases. A 20th anniversary would be around 2014
You can find the 20th-anniversary releases on the following official platforms:
Yes, L'Arc~en~Ciel is a well-known Japanese band that started in the 90s. A 20th anniversary would be around 2014. They have released compilations, live albums, and maybe digital releases. The user might have misspelled the name. So adjusting the topic to L'Arc~en~Ciel 20th Anniversary would make more sense. Then the content can focus on their 20th anniversary, official releases, and where to legally obtain the MP3s.
Spotify Playlists: Official setlist playlists for Day 1 and Day 2 are available on Spotify.