dsd hard solution, that is, dsd data flow through the chip to decode. However, after the dsd data stream enters the chip, some chips still internally convert it into pcm data for decoding, so the listening sense is no different from soft solution. Although some chips have direct solution channels, they are not necessarily used in product design. Therefore, the hard solution is not necessarily a direct solution, and it is also possible to have a \"soft solution\" mode in the hard solution.
The soft solution is to convert the dsd data stream into PCM data stream through the software at the front end and then send it to the decoding chip.