PlatterSpeed - Vinyl Tool
By ProgTec GmbH
This app is only available on the App Store for iOS devices.
PlatterSpeed is an easy way to calibrate turntable speed to proper 33 1/3 or 45 RPM using a 3150 Hz testtone.
Using a testrecord with a 3150 Hz track you can record and adjust with your iPhone (or iPad) from the loudspeaker in an endless loop. The current speed relative to the nominal speed is visualized through a colored graphical indicator.
Measuring the speed this way is absolutely exact in contrast to using a traditional strobe disk.
The frequency data can be recorded and then be displayed in a graphical chart view (frequency vs. time). The frequency data can also be evaluated numerically.
*New*: In-App Purchase to calculate WOW according to DIN IEC 386 (formerly DIN 45507). Expensive special equipment was needed before to do so!
Note that you need a record with the test tone. The Adjust+ testrecord is a perfect fit - others might work as well but no warranty. The app has a demo mode to test its functionality without a test record.
Details on Adjust+: www.adjust-plus.com
What's New in Version 2.2.1
- Fix for lowpass-filtered chart info showing too high values in some situations.
- In-App Purchase: WOW calculation according to DIN IEC 386 (formerly DIN 45507)
- In-App Purchase: frequency chart archive (save/load charts on device)
- show current recording time
- several fixes and improvements
Luckily I own a splendid calibration record from the 70's I bought at a Salvation Army for a buck. It was mint. This app locked right up with my tones and I mean exactly in sync. It is the only app that I calibrate with that does not jig at the exact frequency you are locking up. You are on or off, sharp or flat. No mini-increment hassles. The sensitivity of the app is calibrated to be less sensitive thus throwing out the overtones and the mic responds to this perfectly. Too bad the maker has not developed any other alignment apps or tone generators/spectrum analyzer apps. I like exact readings. I don't enjoy over sensitive apps that are jolted by breathing and have you tweaking a piece of gear as it never locks in and stays exactly in it's frequency reading point.
This App appears to be very precise in allowing you to see how your turntable is performing over time. On my turntable set up record by Cardas, one of the 1000 hz bands was consistently variable while the other two were perfect. What I concluded was the speed variability of the cutting head was greater than my turntable, which is to say, the turntable was faithfully playing back the flutter from the cutting head. This App has also shown that ambient temperature affects turntable performance. If I run the turntable for 5 or 10 minutes the speed consistency is better.
Great idea, but needs more work
I'll keep trying it because I'd love it to work.
- Category: Utilities
- Updated: May 16, 2013
- Version: 2.2.1
- Size: 3.1 MB
- Languages: English, German
- Seller: ProgTec GmbH
- © 2011-2013 ProgTec GmbH
Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch.
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