The latest version 8 of the WFGUI program by Alex Freed - a small program that can replace a hardware W&F meter. It measures Wow&Flutter at either 3kHz or 3.15kHz, in the WRMS or DIN wtd standard, as well as the input signal frequency.
Note: This software is provided in good faith, but supplied "as is" without any warranty of any kind.

Real-time frequency counter from William Andrew Steer - very useful for a tape deck speed setting!

A musical fragment recorded with +/-2LSB only to check the low level capabilities of audio DA converters (Stereo 16bit 44.1kHz format, RMS level -91dB, 25s long, 0.6Mb compressed size)

BASF Calibration Mechanism Manual (PDF file 16MB)

Dynamic Bias Control with HX Professional by J Selmer Jensen and S.K. Pramanik, Aug 1984 (PDF file 3.7MB)

Tandberg Actilinear and Dyneq advert (PDF file 1MB)


Panasonic Tape Recorder Technical Terms, 1969 (PDF file 18MB) Courtesy of Thinkchronicity


Basics of Cassette Mechanism, JVC Service Guide 1976 (PDF file 14MB) Courtesy of Thinkchronicity

With a kind permission from the author.

Reference Guide for Batteries (PDF file 170kB)

Reference Guide for Flash Cards and Drives(PDF file 530kB)

Reference Guide for Optical Media(PDF file 2.81MB)

Micro Hard Drives(PDF file 355kB)

With a kind permission from the author.

The Technical Argument for Chromium Dioxide (PDF file 1.9Mb)

Technical bulletin #2 - Meters and Measurements (PDF file 200kB)

Technical bulletin #3 - Bias (PDF file 670kB)

Technical bulletin #4 - EQ (PDF file 350kB)

Technical bulletin #6 - The Cassette Housing (PDF file 1.1Mb)