![]() It uses 5 SPEs - 3 SPEs for DST decompression, and 2 SPEs for DSD to PCM conversion. Then he threw away the old source code and wrote a faster new codec in 3 weeks with the knowledge he had gained. ![]() In the first 2 months the developer optimized it into realtime processing. DST changes compression methods and parameters every 1/75 seconds, which eats huge processing load when decoding. SACD is stored in the DST format (= compressed DSD).A developer from the Sony HQ who developed softwares for VAIO PC came to SCE and they assigned the development of an SACD decoder codec to him. The manager of the Software Platform division at SCE who were in charge of software codecs and players estimated it'd be impossible to finish if they kept that pace. ![]() But even at the beginning of this year the SACD decoder was 6 times slower than realtime to convert surround DSD sound into PCM. SCE began the development in a relatively earlier stage. Though PSX (the DVD recorder) was too weak to decode SACD in software, it was expected that the PS3 would be able to.
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