I don't know how widely known this is among the HN crowd, but: Sennheiser did professional audio equipment for many decades before they entered the consumer market. To me, it sounds like they're returning to their core business.
many sims use some variety of SPICE and some convergence algorithm a-la Newton's method to discover the voltages and currents at the nodes. simulating a system where every single component runs in parallel with every other component isn't easy.
speaker frequency response simulations will sometimes use an equivalent electronic circuit. it could help design better speakers. any time you interface digital circuitry with the real world, hybrid circuitry is used. also, with this increased processing capacity, you could be looking at simulating the parasitic properties of components, not just ideal versions of them.
i've had a lot trouble with analog simulations in SPICE. they often fail to converge or run incredibly slowly. i do a lot of audio circuitry. the speedups addressed here could potentially make it possible to simulate audio circuits in real time. suppose you feed a signal in via an audio interface, pass it through your analog processing circuitry and play it back in real time. the design cycle would be so much faster.
the article seems to skip over the entire field of colour science. there is a colour space for the human eye. it's called LMS. there is also a colour space, derived from it, called CIEXYZ. it's the colour space that all ICC profiles are specified in. they are RGB-like in nature and correspond to the three types of cone cells in the human eye. there are other colour spaces that derive from it, such as CIELab and CIELuv, which are luma-chroma versions of XYZ.
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