Discussion in 'Desktop & Laptop Computers Forum' started by tripez, Oct 31, 2003.
I have some CDs label 24bit remastered. Are these true 24bit?
cd as a standard is 16 bit. 24 bit remastered means that it was recorded through 24bit equipment, whether this makes the cd sound better is hard to prove as there are so many other factors to consider. Cds are all 16bit though dispite manufacturers claiming higher quality by using 24bit converters.
perrin thanks for clearing that up.
There are two way for getting more than 16 bits out of ordinary CD.
CD recorded using HDCD technology (High Definition Compatible Digital), that when using a suitable player delivers 20bit resolution. Thjis technology was bought by Microsoft and included in Windows Media Player.
DTS encoded CD deliver 24bit/96KHz multi-channel from ordinary CD media. To play them you need CD/DVD player with DTS decoder built-in or digital connection to DTS enabled receiver.
Both CD can be ripped as usual, although HDCD appear to loose the extra information.
as i understand it neither of those are red book standard though as they both require additional hardware or specific components to achieve the optimum performance. They are just additional non standard formats, albeit some cd players now have HDcd Support. Having said that HDCD makes a good case for itself as its backward compatible with current 16bit cd players.
another example of a non standard is recording MP3 music to cd and playing it in an mp3 enabled cd player.
If the HDCD track is ripped bit-for-bit, not compressed in a lossy format and your soundcard doesn't alter the digital data, the encoding will survive. It's possible to rip a HDCD track, encode it using APE, play it out through a soundcard's S/PDIF into a DAC and still have the HDCD encoding present. Many soundcards will alter the PCM data by resampling or volume control and this would destroy the HDCD info.
I have just tried HDCD through the SPdif output on my RME 96/8pst and it works fine when played with media player 9.
HDCD light lit up on my AV32r.
I think the both formats are red book format in a sense that any CD player capable of reading a red book format will read and understand those CDs as audio CD. It may not produce a pleasant sound but this is a codec issue.
On HDCD, if you rip your HDCD into WMA lossless, does your received still recognises it as HDCD?
never tried it, will have a go, i doubt it though
All CDs are indeed 16bit....if mastered at higher resolutions,the data is then decimated down to 16 bit for the CD itself.
this is what i said in the second post.
perrin21.....completely missed your line up there.....no offence intended.
For what it's worth,what I was getting at was the data reduction used in reducing 24bit masters to 16 bit CD.....on that point it's very interesting to compare upsampled CDs(via dCS or P-Tech digital processors)with the 16bit originals.
no offence taken.
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