In Reply to: I discovered why you lie about SACD, you are a DVD-A Producer & Mix Engineer posted by Teresa on August 25, 2004 at 22:32:35:
Liar?
I don't think so!
The limitations of DSD are well known to anybody who can actually be bothered to do the research.
Let me give you a couple of facts:
DSD64 allegedly uses 64 times the sampling rate of CD. WOW! It MUST be better!
But - CD uses 16 bits, having 65,536 combinations or levels of information, delivering 2900 million combinations per second, whereas DSD64 uses single bit data having 2 combinations and thus delivers 5.6 million combinations per second. Thus, the information capacity of SACD is about 0.2 percent of CD.
Single bit data is the least efficient way of recording there is.From the "high bitrate of DSD64" comes the claim that the bandwidth is enormous. This also isn't true either. To make the system work, the signal must be extremely heavily noise shaped. Noise shaping should be carried out last. Or all you will ever get is degradation in the signal & loss of resolution every time you attempt to carry out any kind of processing on it - which again you cannot do in DSD. No EQ, no mixing, no nothing, because the instant you do any of this type of work, the signal by definition becomes multibit again. And due to the noise shaping, this will lead to loss of resolution.
Now the next big SACD Lie..
It is frankly ridiculous to suggest that the supposedly "ultrasonic" frequencies in SACD are contributing anything at all. If that were the case, then why is the upper limit at 22KHz? I'll tell you - because all that is up there over 22KHz in SACD is noise, and lots of it. And if our ears are that good, we will hear this noise, or at least it will interfere with the music. So, knowing this, the designers of SACD came to the logical conclusion - It must be filtered out. In actual fact, SACD sounds better when played through Linear Phase 20KHz LPF.And a well recorded, well produced standard CD sounds just as good when played back through a properly set up system.
The sad truth is that most CD's are badly produced these days, which is why you think SACD is an improvement. It is not.But I'm almost certainly wasting my time here, as you obviously do not care about the truth, hence the personal attacks on me. Why is that - no convincing arguments? No, I thought not.
Oh - by the way. 24 bit PCM gives us a dynamic range of 144dB across the entire spectrum. SACD gives at best considerably less.
A 2.8224MS/s 1-bit A-D converter gives, with careful tweaking, the same performance as a 20 bit system from 20Hz - 20KHz.And thems the facts, wether you like it or not.
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Follow Ups
- Re: I discovered why you lie about SACD, you are a DVD-A Producer & Mix Engineer - Neil Wilkes 02:41:07 08/26/04 (13)
- wrong calculation - tunenut 09:24:44 08/26/04 (2)
- Re: wrong calculation - Neil Wilkes 09:52:31 08/26/04 (1)
- Re: wrong calculation - tunenut 10:45:04 08/26/04 (0)
- Re: I discovered why you lie about SACD, you are a DVD-A Producer & Mix Engineer - LiquidMidrange 07:31:30 08/26/04 (5)
- Re: I discovered why you lie about SACD, you are a DVD-A Producer & Mix Engineer - Martin419 09:08:45 08/26/04 (4)
- Re: I discovered why you lie about SACD, you are a DVD-A Producer & Mix Engineer - LiquidMidrange 09:11:39 08/26/04 (3)
- Right..the transient rise times in DSD filtering is 1/10 that of even 192khz.. - theaudiohiffle 12:13:16 08/26/04 (2)
- Nonsense.. - Frank.. 16:03:26 08/26/04 (1)
- Not quite nonsense... - theaudiohiffle 18:03:26 08/26/04 (0)
- Those are not the facts but terrible distortions which can easily be proven false - Teresa 02:57:44 08/26/04 (3)
- Re: Those are not the facts but terrible distortions which can easily be proven false - Neil Wilkes 05:43:29 08/26/04 (2)
- Re: Those are not the facts but terrible distortions which can easily be proven false - LiquidMidrange 13:39:42 08/26/04 (1)
- Re: Those are not the facts but terrible distortions which can easily be proven false - Neil Wilkes 15:53:34 08/26/04 (0)