RPM - Turntable Speed Accuracy 5.11

The RPM Accuracy Test mobile app is a top-notch tool for turntable enthusiasts. This app allows you to analyze the RPM speed variations, also known as wow/flutter, of your turntable in real-time graphics. Its continuous display feature makes it effortless to make any necessary adjustments if your turntable supports it.

Whether your turntable operates at 16, 33 1/3, 45, or 78 RPM, this app enables you to test its speed and wow/flutter accuracy. Additionally, the app's Worldwide RPM Turntable Accuracy Database provides you with valuable insights into other users' experiences and opinions about turntable accuracy.

• RPM proudly comes recommended by Rega Research Ltd, renowned makers of exceptional turntables.
• The app has received a stellar review from Techmoan on YouTube.
• RPM has also been used in high-end turntable reviews featured in Stereophile magazine.

With RPM, you can easily visualize the wow/flutter accuracy as the maximum percentage deviation from the average RPM of your turntable through both numerical values and graphical representation in a chart. Moreover, you can save all your RPM test sessions to the history log for future reference or sharing.

Using the gyroscope in your iPhone, RPM accurately determines the rotation speed of your turntable, automatically detects the speed setting, and reports its accuracy. Simply place your iPhone on your turntable, close to the center but not necessarily directly over the center spindle. As your iPhone rotates, the display will remain stationary for easy reading.

One unique and remarkable feature of RPM is its scrolling graph that visually represents the variation in RPM accuracy over time. This graph effectively displays wow/flutter effects caused by factors like uneven surfaces, belt wear, and stylus resting in record grooves. Additionally, RPM now offers a new innovative feature that visualizes wow and flutter variations as a heat map around the vinyl center, providing you with precise information on where inaccuracies occur in the turntable rotation.

While there are several methods available to test the average RPM of your turntable, RPM stands out for its ability to effectively demonstrate wow/flutter variation over time. Other turntables may have this feature built-in, but none make it as practical and accessible as RPM.

The app allows you to customize the parameters for the history graph, such as setting the moving average sample size and determining the accuracy threshold at which the RPM circle turns solid green. You can also set a duration for freezing the display updates after the turntable stops to ensure they can still be read.

The real-time display in RPM relies on the accuracy of your iPhone's gyroscope. If you suspect any discrepancies, Calibration Mode allows you to automatically test and apply necessary corrections in real-time. The auto calibration feature uses the compass to count turntable revolutions. However, please note that older iPhone models (prior to iPhone 6S) may provide unreliable results. In such cases, you can manually add your own multiplier if you have performed an independent calibration.

RPM has undergone extensive testing to ensure that it can help you set up your turntable within 0.1% of its target RPM, granted your turntable allows adjustments and remains stable within that tolerance.

Don't miss out on the World RPM Turntable Performance Database, which has amassed over 10,000 submissions from users worldwide. This database serves as the ultimate resource for researching the most accurate turntables available. To participate, upgrade your app and upload your own turntable data through the Settings menu. Make sure to set the Freeze time and conduct an RPM session as usual. At the end of the session, you will be prompted to name it and given the option to upload it to the World Database. You can also upload sessions from History at any time.

Upgrade to the premium version of the app to enjoy unlimited measurements, continuous display, access to all settings and speeds, and an ad-free experience.