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Tap tempo BPM calculator and beats-per-minute to milliseconds converter. Sync delay, loops, and metronome timing for music production workflows.
Calculate delay and reverb times in milliseconds synced to tempo and BPM. Find quarter, eighth, and dotted note delay values for any song speed.
Convert between audio sample rates including 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz. Check file duration and sample count when changing rates.
Pitch shifts proportionally with speed. A percent speed change equals the same percent pitch change in semitones via log relationship.
Pitch change (%) = ((new RPM / original RPM) − 1) × 100Each octave is 12 semitones; doubling speed raises pitch one octave (+12 semitones).
Semitones = 12 × log₂(new RPM / original RPM)Recorded tempo scales linearly with platter speed — useful for beatmatching without pitch slider.
New BPM = original BPM × (new RPM / original RPM)Updated: July 2026
A 45 RPM single played at 33⅓ drops pitch ~26% and slows BPM proportionally — detect wrong speed by ear or BPM tool.
Raising speed 2% increases BPM and pitch ~0.34 semitones — fine for minor beat sync in DJ mixing.
Playing 78 at 45 RPM lowers pitch significantly — calculate correct RPM or use variable-speed turntable.
Heavy time-stretch introduces artifacts. Calibrate turntable speed first; use software correction only for minor adjustments.
Use 33.333… RPM for precision. Small rounding errors matter when stacking pitch changes across multiple tracks.
Vinyl records play at standard speeds — typically 33⅓, 45, or 78 RPM. Calculate pitch and tempo change when adjusting turntable speed, converting between RPM settings, or correcting off-center pressings and belt wear.