Test discs for turntable and CD

The Ultimate Analogue Test LP

https://fromvinyltoplastic.com/the-ultimate-analog-test-lp-review/

Test CD

https://en.wikipedia.org/wiki/Test_CD

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Heh… the browser window I opened that link in truncated the title-bar to “The Ultimate Anal…”

After snickering at the obvious sexual innuendo, I was mentally auto-completing it to “The Ultimate anal-retentive turntable tweaker’s guide to…” or something like that.

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We can gather 5 people in the evening and listen to 20Hz and 20kHz sounds.

The majority will decide whether these frequencies can be heard.