[eqvinox]

> The defacto industry standard for audio ICs is I²S, an I²C-based bus optimised for audio data.

Nit: I²S has nothing to do with I²C.

(Most I²S chips also have an I²C interface since I²S only carries raw audio data, no sideband like volume control or clock configuration. But that's a separate interface and can also be SPI rather than I²C. In fact, SPI is more closely related to I²S than I²C is.)

[phire]

Yeah, it's much closer to SPI.

The reason why they both follow the same naming scheme is that Philips Semiconductor (now NXP) made both.

[TazeTSchnitzel]

I²S is a remarkably simple design. There's no protocol handshakes, it's just raw PCM. I like how it's designed so sender and receiver can use totally different sample bit-depths (in either direction) without any incompatibility.

https://web.archive.org/web/20070102004400/http://www.nxp.co...

[a1o]

Thanks for this comment, it lead me to look into I2S and I learned something new!