RPM ~ Turntable Accuracy Checker

RPM – The Turntable Accuracy Checker Now with the World RPM Turntable Database

Test the rpm accuracy of your turntable, whether 16, 33, 45, or 78.

RPM uses the gyroscope in your iPhone to determine the rotation speed of your turntable, automatically determines which speed setting you’re on and reports how accurate it is.

Simply place your iPhone on your turntable, directly over the centre spindle is recommended but close to the centre will still give good results. As the iPhone rotates the display will remain stationary from your perspective for easy reading.

The best, and UNIQUE, thing about RPM is it also shows a scrolling graph of the rpm accuracy variation over time, this shows wow/flutter effects, especially those associated with the turntable not being level, belt wear, etc.

You can even detect the small drag caused by the stylus resting in the grooves of the record.

While other utilities may well show you the average rpm over many revolutions, RPM shows you how the speed is varying within a single revolution, wow/flutter can sound worse to your ears than simply being slightly fast or slow.  If you can’t identify and measure it you can’t fix it.

Submit your own turntable readings to the World RPM Performance Database, see how turntable makes and models compare with submissions from around the world.  RPM will become the ultimate resource of TT performance out there, a truly crowdsourced turntable database.



The Loudspeaker Explorer ~ Colaboratory Notebook

A speaker measurement visualization, analysis and comparison tool.


Dynamic Range Database ~ Compare Album Loudness

An online database of contributions of dynamic range measurements searchable by Artist / Album:


An (optimized) implementation of the music DR measurement (compliant with http://dr.loudness-war.info/), it supports CUE sheets and is faster than all currently available alternatives

~ github.com/magicgoose/simple_dr_meter
~ Foobar2000 component

The Mod Archive ~ Mod Music Repository

An internet repository for permanent storage of quality music modules from the tracking and demo scene. The Mod Archive began collecting music modules back in 1996. Since then, it has grown and become one of the largest and oldest collections online, thanks to the artists that contributed to The Mod Archive and the Public Domain in general.


mlYou ~ Music Library Utilities Suite

This is a collection of tools to help you manage, maintain, and optimize your own music library for a better experience.

It makes growing and maintaining a music collection of any size easier by automating necessary (but tedious) processes.

The tools currently aim to assist with music organizing and tagging, and playlist management.

Cross-Platform Compatible – Works and tested under Linux (Ubuntu) and Windows. Mac untested but expected to work similar to linux.


KVR Audio ~ Plugin Community Database

KVR Audio is a community and news site for popular Audio Plug-in formats and related subjects, such as sample libraries and mobile apps. Our mission is to supply up to date news to VST, AU, RTAS, DX and DSSI/LADSPA plug-in and iOS and Android App users in a friendly, up-front and timely manner.

Search For Plugins
List Of Plugins

h-node ~ Online Open Hardware Database

The h-node project aims at the construction of a hardware database in order to identify what devices work with a fully free operating system. The h-node.org website is structured like a wiki in which all the users can modify or insert new contents. The h-node project is developed in collaboration and as an activity of the FSF.