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Join Date: Jul 2005
Location: St. Louis, Missouri
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Ok. Quick education time...
CD redbook quality is 44.1khz/16 bits. The 16 bits represents the dynamic range or the potential difference between the loudest and softest sound in the file. The 44.1khz in sampling theory represents double the highest potential frequency that can be exactly digitized without loss. Thus 22khz or above "human hearing". The ONLY reasons to record music above 44.1khz/16 bits are:
1. Allow additional headroom for filtering, compression, noise correction, etc.
2. Capture as much energy in the room that might come from sounds that we cannot necessarily hear but may be able to sense.
3. Allow for greater range in the quietest to loudest sounds.
Most recordings to date have been done on equipment that could not even come close to these specifications. For example, the Nirvana album cited above was recorded in early 1991 on a Studer 2" tape machine that is almost identical to the one that you will see in my signature below. The microphones, tape and tape machine used in this recording could not produce more that 10 bits of dynamic range and could only capture frequencies below 18khz when freshly calibrated. All you would need to fully play this back would be a file that is 36khz/10bit. Anything above that would be a bigger file padded with zeros.
According to Amazon, if i were to digitize a record that i was playing back from a 1913 Edison player using a $2 plastic Hasbro microphone at 192khz/24bits, that would be called ULTRA HD quality.
I like TRUE High Resolution recordings that are made with high res microphones using Hi Res DACS and saved with 96khz sampling without using low res mixing/mastering plug-ins. There are very few recordings that are true high resolution. You must generally check with the label. Some of these labels are AIX Records, 2L Records, and Naxos.
I would be surprised if the total number of real high resolution recordings that Amazon offers is above 300 even if they label 2 Million of them that way. This is why knowing the provenance of a recording is so important!
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Last edited by mlknez; 09-17-2019 at 05:04 PM.