Turntable / Audio tools
Web tools for checking turntable speed stability and wow & flutter.
Wow & flutter
Wow and flutter are slow and fast speed variations in tape decks and turntables. They show up as pitch waver — wow is the slower warble (roughly under a few Hz), flutter is the faster shimmer. Standards such as DIN (IEC 386), JIS, and NAB weight those variations so you can compare decks with a single percentage reading.
W&F meter
A line-in wow & flutter meter for turntables and tape decks, using test tones (DIN 3.15 kHz / JIS–NAB 3 kHz). It locks the carrier, splits wow vs flutter, shows a spectrum and weighted wow trace, and supports DIN, JIS, NAB, CCIR, and 2σ. Designed for use with a USB ADC (line input) — not the device microphone.
GyroTach — RPM & W&F
A MEMS tachometer for turntables: place the phone face-up on the platter to measure RPM and wow & flutter. Supports common speeds (16⅔, 33⅓, 45, 78) and DIN / JIS / NAB / 2σ standards.
