Galaxy S7 has custom camera module with Sony IMX260 sensor, and homebrew audio DAC
Pixel system in the sensor for incredibly fast focusing times, too, so it's definitely a brand new custom-made unit.
Going further down the component models, as reported by the system info app, we see another custom chip, dubbed Lucky CS47L91 Sound, which indicates a homebrew audio processing unit, as Project Lucky is what Samsung was reported to call the Galaxy S7 internally - seven is a lucky number not only here, it seems. Samsung promised an improved audio experience at the S7 presentation, and this custom DAC may be one of the reasons. Moreover, we recently saw that the speaker to be utilized in the Galaxy S7 is a powerful for a phone 1.5W unit, which adds more water to the superior audio mill.