A form of distortion caused when a tape transport or a turntable is subject to rapid speed variation. Irregular motion of the recording medium sometimes induces forms of frequency modulation. “Wow” usually refers to the range of fluctuation frequencies between about 0.1 Hz and 10 Hz and is perceived as pitch fluctuations. “Flutter” usually refers to fluctuation frequencies above about 10 Hz.
"Thank you for processing my recent order - I was very pleased with it, and you did it very quickly. I would definitely use your service again."