Blu-CD or SACD? (not the new Blu-spec CD, discussing profile 3.0 BD vs. SACD)

[Alex Pallas]

Originally Posted by Sir Terrence

Alex,
Are you referring to the sample rate, or the frequency response? If you do analysis on a frequency sweep, most all of the frequencies will be below below 20khz. You will not find any frequencies above 22.5khz on any CD because of the filters required to prevent aliasing of the digital audio.

I have done several recordings in PCM that had instrument harmonics greater than 20khz utilizing ribbon microphones.

okay, i think i understand where i'm getting lost now, yeah, i was talking about sample rate. but i still have to question how many recording masters can actually take advantage of the frequency range available in DSD of the potential blu-ray audio format.

furthermore, from my understanding BR discs are using audio formats from companies such as Dobly, so does creating another format really make sense? and wouldnt there be compatibility issues with players already in circulation?

i must admit i am a bit lost.