Vinyl depends on a mechanically driven system and any such system will introduce minute changes in the speed and pitch of playback.
High pitch noise vinyl.
A high frequency squeal can be caused by many factors.
Sometimes is can sound like a buzz or a very high pitched whistle.
A vinyl record that is even slightly warped or has a hole that.
There is one more quality control issue that plagues the record making process.
This noise is the most dreaded of the cutter induced noises.
June 15 2016 because there are several possibilities and because brakes are a crucial safety feature it is best to have a pro diagnose noise.