[audioman999]

I purchased my first 24bit/100K Hz CD today which is 99.9999% Silver.  Not sure what that means.  Anyways, I bought it for the music and not the specs.  However it raised a question with others at the store that no one was able to answer.

Will my 10yr old Rotel RCD 991 acting as a transport pick up the 24bit data for the BDA to process?  Or will it only read standard redbook 16bit data?

[skunark]

Guess you have a DVD not a CD.. The RCD 991 will do HDCD but nothing higher and if the "cd" plays I would question it.  Can you link it?

[Phil A]

The manual is here:  http://www.rotel.com/content/manuals/rcd991_eng_fre_ger_spa.pdf

[Phil A]

and it says "With its precision transport, 20-bit 8-times
oversampling digital circuitry"

[audioman999]

Thanks for the replies.  It definitely is a CD and clearly states 24 bit on the front of the case.  Picked it up today at the Montreal Audio show.

It seems that the rotels D/A section will only go to 20 bit based on the manual.  But, if I am using it as a transport only and bypassing the D/A section, is it still limited to 20 bit or will it read however many bits the CD has and leave it up to the BDA1 to be able to process at 24 bits.

[Phil A]

Thanks for the replies.  It definitely is a CD and clearly states 24 bit on the front of the case.  Picked it up today at the Montreal Audio show.

It seems that the rotels D/A section will only go to 20 bit based on the manual.  But, if I am using it as a transport only and bypassing the D/A section, is it still limited to 20 bit or will it read however many bits the CD has and leave it up to the BDA1 to be able to process at 24 bits.

You sure it does not say (the CD was) mastered from 24 bit?

[Phil A]

http://en.wikipedia.org/wiki/Audio_bit_depth

[skunark]

I wonder if it's a CDR vs a normal CD.   CDs are 44.1/16, not even sure you can budge from that unless it's an HDCD which is still 16-bit, but encoded in a way that if detected will playback in 44.1/20.  SACDs...well one can argue the bit rate, but depending on your side of the fence is equivalent to 96/20-bit or 96/24.     

[audioman999]

Good point about the mastering.  The guy selling them (completely unbiased i'm sure) was telling everyone that they were 24 bit cd's and would work in the newest CD players at 24 bits and the old CD players at 16 bits (not sure if that means downsampled or not).  He thought (he was a bryston dealer) that any CD player used as a transport would pick up the 24 bit and that the BDA1 would then be able to process at the full 24 bits.  Others around were not so sure.

http://www.firstimpressionmusic.com/product_p/limk2hd032.htm

That is the link to the actual CD.


(vi) K2 HD: The K2 Team at JVC did not rest on its laurels. In 2004, another major breakthrough was achieved with the encoding not only of 24 bits, but also a 100 kHz sampling rate, into the Redbook confines. After the testing of this technology in the Japanese domestic market by JVC, FIM officially launched this superior K2 HD mastering format in August 2007 at the Hong Kong High End Show, and then again later at the January 2008 CES.

The CD i purchased is a K2 HD

[Phil A]

Here is info about the process - http://www.jvcmusic.co.jp/flair/e/k2hd/k2hd.html

[werd]

I am pretty sure redbook players are only 16 bit. I don't think the laser can read 24bit on any of the cd players. Those are nice recordings - the ones done using the jvc k2.