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In Reply to: Re: 24/48, 24/88.2, or 24/96..? posted by Martin on May 07, 2003 at 07:22:28:
On my system and with my ears, I find that resolution on DVD-A is correlated (not linearly) with the data rate, assuming that only 20 bits are audible with PCM. On this scale:
Index LOG
44.1/16 25 1.4
44.1/24, HDCD, DTS CD 31.3 1.5
48/24, DTS 34 1.53
96/24 68 1.83
SACD 100 2
192/24 136 2.13
Follow Ups:
is this your subjective scale?
or some kind of measures?Best
For example, 48/24 is "corrected" to 48/20 since only 20 bits are audible with current technology. Hence the bit rate is 960 kHz, versus 2822 for DSD (Index=100), or 33.33 (oops - I said 34). The logarithmic scale is just a conjecture, but seems to work in many audio contexts. What I like is that digital audio divides up rather neatly into two groups with relatively fine differences among them. Obviously, 96/24, SACD and 192/24 is the Hi Rez group.By the way, the redundancy in PCM is not a bad thing. As frank has pointed out, BM chews up two bits - bits which SACD doesn't have to spare.
You left 176.4 out, which has many advantages, including being an integer multiple of 44.1, but is not compatible with a lot of professional equipmentI thought DSD was the "translated" PCM equivalent of 115k ?
Best
Eric
just a 1/20 decimation in SBM. My contention is that this would be the closest approximation to the sound of SACD in PCM. Of course, its not supported.
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