![]() HQCD - another manufacturing technique that aims to reduce error correction which is an intellectual exercise at this point as it doesn’t make any difference to sound quality due to built in error correction mentioned before. This doesn’t change the quality of the sound, it simply reduces manufacturing errors inherent in a traditional cd pressing process and therefore improved margins for manufacturers or at least a nice little royalty for Sony. Sometimes they use Platinum for the shiny layer and call that out to market against more costly and far less common Gold these days.īluspec & BS2 - manufacturers write to cd discs using a different laser developed by Sony for Blue Ray discs. SHM / Platinum- Super Hard Material discs upgrade the materials used in layers A,B, & C of a traditional CD making the product less susceptible to perforations caused by light getting through the thin layers of aluminum. ![]() ![]() Gold doesn’t make things sound better, it just makes the shiny layer less susceptible to degradations called perforations. Gold Discs - manufactured using gold instead of aluminum for the shiny “B” layer. If someone else already did this an my search skills are just rubbish, please lmk and I’ll edit accordingly. If it’s wrong in any way, please let me know and I’ll edit accordingly. I wasn’t able to find a concise listing on this forum of the various cd formats so I’m posting this here.
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