Vinyl is far from open source CD due to limitations of phisical format and the fact that good vinyl contains specifically mastered for vinyl with those limitations taken into account.

You can still easily buy Bluray player and open source your discs with ARM (not CPU/SoCs, different one)

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ginko 3 hours ago | parent [-]

If you're referring to the RIAA equalization curve[1] that is completely open and well defined.

[1] https://en.wikipedia.org/wiki/RIAA_equalization

	▲	sam1714 2 hours ago \| parent [-]
		Like all analog formats, vinyl has a non-linear response. Things like total amplitude and frequency content affect noise and distortion when reproduced. Another factor is that it's a constant angular velocity medium, so the response is different at the beginning than the end. These are factors that a good mastering engineer takes into account. This occurs in the digital world as well. When we went to DVDs, the studios had encoders/authoring engineers, who tweaked compression parameters per scene, as compression is another non-linear process. For example, they might apply a small amount of blur on a dark scene where film grain trips up the compression. Eta: Apple provides the exact pipeline [1] they use for their services so the sound engineer can listen to the output and adjust. [1] https://www.apple.com/apple-music/apple-digital-masters/