/diy/ - Do It Yourself

>>1815060
Dolby SR is for theater quality sound.
This was a prototype, which means all the parts needed to be hand soldered. And also there was no market for any specialized ICs specific to this function.
Filtering is extremely complex. There's different filters for different parts of the audio spectrum. There's multiple channels and multiple frequency bands, and the cross-over regions between them.
This system is not "just" the noise reduction stage, but noise reduction is the main goal of the whole system. Noise generally means unwanted shit in the signal, not like...white noise.