Learning from human timing.
Synchronizing the next song.
AISyncmaker automates lyric transcription and real-time synchronization for AI-generated music, reducing repetitive manual lyric-timing work.
AISyncmaker's automatic synchronization program was developed using human-annotated real-time synchronization data from 238 songs for training. It has already generated synchronized lyrics applied to Changpop Karaoke. The service combines this workflow with full-song playback, timing review, and lyric editing.
Project timeline
Development started in .
Website launched in .
Our development direction
- Learn from paired audio, lyrics, and human-annotated timing, with 238 songs used for training.
- Generate lyrics and real-time synchronization with the implemented automatic-sync program.
- Review full-song results and correct lyrics or timing where needed.
- Improve alignment quality and extend the workflow into a more accessible web workspace for creators.
What works today
The web workspace offers audio transcription, synchronized lyric preview, manual timing corrections, and JSON, LRC, SRT, VTT, and text exports. The homepage also features complete-song results generated with AISyncmaker's existing automatic synchronization program.
Human timing data & full-song examples
All 238 tracks with human-annotated real-time synchronization in Changpop Karaoke's Oracle production-server collection were used for training AISyncmaker's automatic synchronization program. These paired audio, lyric, and timing data also provide references for ongoing quality evaluation and improvement.
The homepage demo plays the complete original recordings of Track 05. Dr.SHIN and 리더. Their real-time synchronization was generated with AISyncmaker and is already applied to the 26-3 collection in Changpop Karaoke. The demo uses those original syllable/word timestamps and the same seven-line lyric display, progressive highlighting, and countdown behavior.
Current stage
The automatic synchronization program is implemented, trained using human timing data from 238 songs, and has generated results already used in Changpop Karaoke. Current development focuses on improving alignment quality for AI-generated singing, expanding evaluation, and integrating the workflow into the web workspace.
Creator & contact
Creator: Junhyeong Kim
Contact: contact@aisyncmaker.site
AISyncmaker is an independently developed AI music tool created and maintained by Junhyeong Kim.