Song to LRC: Auto-Sync Lyrics into an LRC File, Fully Offline
Time-synced lyrics are what make a karaoke screen highlight the right word and a lyric video land each line on the beat. They live in an LRC file: plain text with a timestamp on every line. Making one by hand means transcribing the vocal and tapping out timestamps line by line - slow and fiddly. PumpyDumpy2AudioMaster (PD2AM) does it automatically, locally on your PC, so your audio is never uploaded.
It uses Whisper to transcribe the vocal and align each line to the audio, then exports a standard .lrc you can use anywhere - or edit first.
What an LRC File Is
An LRC file pairs with an audio track and carries a timestamp on each lyric line, so a compatible player can highlight the words in time with the music. It is the standard format for karaoke apps, many music players, and lyric-video tools. Because it is plain text, it is small, portable, and easy to tweak.
Automatic Transcription and Time-Alignment
Drop in a song and PD2AM uses Whisper to transcribe the vocal and place each line at the right moment in the track. You get a synced draft without typing a word or setting a single timestamp. Already have the correct lyrics? Paste them in and let the tool handle just the time-alignment, so the words are exactly right and the timing is automatic.
Review and Fine-Tune Before Export
Auto-transcription gets you most of the way, and you stay in control of the result. Review the lines, fix any misheard words, and nudge the timestamps so the highlight lands precisely on the beat. When it looks right, export a clean .lrc ready for your player or video tool.
From LRC to a Lyric Video
Once you have a synced .lrc, the obvious next step is a lyric video. PumpyDumpy2AudioMaster writes a bridge file for its companion app, PumpyDumpy2Visual, so your audio and lyrics drop straight into a beat-reactive lyric video. Pair this with the karaoke video maker workflow for the visual side.
Offline and Private
The Whisper model is bundled into the installer, so transcription and alignment run entirely on your machine. There is no upload, no cloud queue, and no account holding your files - which keeps unreleased songs and private recordings off third-party servers. It is also faster: no upload, no download wait, no daily cap.
Pricing
PumpyDumpy2AudioMaster is free to download and use, with a light watermark on exported audio. Pro removes the watermark and grants a commercial-use license for $20/month or $200/year. The same Pro subscription also unlocks PumpyDumpy2Visual, so you get the audio toolkit and the music-video app for one price. Already a PumpyDumpy2Visual Pro subscriber? Your existing key activates PD2AM too.