Playing a 33 RPM Record at 45 RPM
Playing a 33 RPM record at 45 RPM raises the pitch by approximately 527 cents — over 4 semitones.
How to use this tool
- Enter nominal rpm and actual rpm in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your pitch shift and the full breakdown beneath it.
Running a 33 RPM record at 45 RPM is a well-known trick for a chipmunk effect — it raises the pitch by more than 4 semitones.
Frequently asked questions
- Why does turntable speed affect pitch?
- A record encodes audio at a fixed groove density. If it spins faster than intended, frequencies are higher (pitch goes up); slower means pitch drops.