Today, thanks to the processing power of modern computers, software can perform Fourier analysis on an audio signal in real-time
: Provides equal weight to all fluctuations, resulting in a "quasi-peak" value that is generally higher than weighted results. Requirements for Testing Wow and flutter measurement for tape deck - Pico Technology
German-made software (~€49) with dedicated flutter meter.
The classic tools (WFGUI) are Windows native. Mac users often struggle with latency. If you are on macOS, skip WFGUI and download or Flutter free (via the Mac App Store). Alternatively, REW works natively on MacOS (ARM and Intel). Wow And Flutter Meter Software Download -
Your ears can tell you something is wrong, but only a wow and flutter measurement (expressed as a percentage; e.g., 0.08% WRMS) tells you if the deck is within factory specifications.
WFGUI, developed by Alex Freed, is widely considered the gold standard for free wow and flutter software.
| Problem | Likely Cause | Fix | |---------|--------------|-----| | No signal | Wrong input selected | Check Windows sound settings → Recording tab → Line-in enabled | | High flutter reading (over 1%) | Bad sound card clock | Use ASIO driver or external interface | | Irregular waveform | Deck speed unstable | Clean pinch roller, replace belts | | Software crashes | Missing Java (WFGUI) | Install Java 8 from oracle.com | Today, thanks to the processing power of modern
To the ear, wow sounds like a low-frequency oscillation or a "wobble" in the music, particularly noticeable on sustained piano notes or woodwinds.
For , knowing the exact wow and flutter specifications is critical. When transferring rare tapes to digital formats, it is vital to document the condition of the source material.
Turntable speed and rumble analysis. Download source: ROOMEQizard.com (Freeware). Mac users often struggle with latency
Audacity is free audio editor. With the Nyquist plugin, it becomes a capable meter. Features:
When using this software, you will typically encounter three main measurement methods: WRMS (JIS)
Measuring wow and flutter helps identify issues such as worn drive belts, dry bearings, or motor irregularities that cause "pitch wobble" in analog playback. Best Wow and Flutter Meter Software for Download
Measures real-time speed in Hz and provides percentage readings for weighted (DIN/WRMS) and unweighted standards.