ranjeetrain
New Member
SACDs and DVD-Audios ! The dynamics improvement because the SACD can use high bitrate audio which naturally allows for more headroom.A normal CD is also limited to a certain frequency range that corresponds to the frequencies we humans can actually hear.
In SACD frequency range over 20khz.Why we need this ?, especially when most humans can barely hear anything up to 18khz... some says that since real instruments produce frequencies well over 20khz, this would be more true to the source and also humans could percept those frequencies, just not hear them (much like very low bass, which is another story).
This doesn't really make any sense to me.
Mostof the CD's today do not even extend to the limitation of the media. Modern recordings are shitty and don't even need the CD quality and additional dynamic headroom because, well, they're compressed to anyways.
Technically, SACDs and DVD-As use 24bit/96khz. Imagine the 96khz to be the resolution of the signal. By theory, you need double the amount khz of the signal to reproduce. let's say your music can go up to 20khz in frequency. You would need at least 40khz resolution to reproduce the tone properly. The CD has a resolution of 44.1khz and this is sufficient.
24bit defines the dynamic range or just the amount of free headroom that is available to a signal. Everything is recorded to 24 bit today. So this is one advantage over the CD, which is 16bit because the "downsampling" to 16bit might have influence on the sound. This is not in any way proven and should not be substantial. But, technically, it is possible to record something that actually uses the whole 16bit of dynamics of the CD. In fact, when recording this happens a lot. Then again, once recorded the signal is predictable and can fit easily on a CD. Let's just say the difference is marginal.
Dear MM, a lot of non-facts in that post. Don't know whether you read something wrong or interpreted something incorrectly. But you do seem to understand a few principals incorrectly. Whatever the case, I'll post in a detailed post later.
Well, my intention is not to hold you back from voicing your opinion, but yes, you got a few basics wrong and someone should tell you where.