Karaoke Machine! ((カラオケマシン！))

Karaoke Machine! ((カラオケマシン！)) is a Chrome extension that turns YouTube into a karaoke machine.

It can karaokize any song by:

• Separating the vocals and instrumental into individual tracks, so you can mute or unmute either one.
• Finding the best-matching lyrics online, with line-by-line timing data when available.
• Extracting precise timing information directly from the song.
• Displaying synchronized lyrics on top of the video.

Even though it is a Chrome extension, it needs a local backend for the heavy work: downloading audio, separating stems, and timing lyrics