MusicReasonProduction, Synthesis, and Audio Math
What LFO rate matches this tempo division?
Choose a BPM and a beat division. This tool calculates the matching LFO period in milliseconds and rate in Hz, so a modulation effect can sync cleanly to your tempo.
Answer
Want to learn more? Musical Time in Delay, Reverb, and Modulation
Understand
An LFO's rate in Hz and its period in milliseconds are exact reciprocals of each other, which is why this tool always shows both: some synths and plug-ins expose one, some the other, and a few expose a named tempo-sync division whose exact label may not match every DAW's own naming convention.
Worked example
At 120 BPM, a quarter-note LFO has a period of 0.5 seconds and a rate of 2 Hz. Doubling the BPM doubles the rate and halves the period, since both move directly with tempo.
Method and limitations
Period uses the same rational tempo-duration formula as Tempo-Synced Delay Calculator; rate is 1000 / periodMs. This tool does not account for a modulation phase reset behavior a specific synth might apply, nor does it match every DAW's own tempo-sync division labels exactly.
Where a synced LFO actually gets used
A tempo-synced LFO shows up constantly in tremolo, auto-pan, filter-sweep, and pitch modulation effects, anywhere a rhythmic pulse should audibly lock to the song rather than drift against it. A free-running (non-synced) LFO at a similar rate will slowly phase in and out of alignment with the beat, which is the exact problem a tempo-synced rate is chosen specifically to avoid.