Dont see how the guitar string violates Fs. Record a guitar at 96k and look at the waveform, the leading edge is not that fast. Do the same with percussion.
I’ve been trying to find the technical aspects of the recording process on some of my ‘better’ sounding recordings and can’t seem to find a whole lot of info.
Is there any kind of pedigree chain kept that’s open knowledge, or is it all kept within the industry?
Is there any kind of pedigree chain kept that’s open knowledge, or is it all kept within the industry?
And no brick wall filte is going to be 100% effective, so i would assume, that when recording music (with any mic that extends beyond Fs), that Nyquist would be violated most of the time (for low Fs recordings, ie CD rez).
This was something i realized on Day 1 when i read the original Sony paper in 1979/1980.
dave
When CD was 1st introduced it was pushing up against practical technical development of the day. The 1st CD players were, IIRC, only really 14 bit.
dave
Thanx. I had to look that up. Expands my vocabulary.
delectation: DELIGHT, ENJOYMENT
dave
Record how? A low BW mic, mic an amp, direct in?
If you use a low BW mic, then of course.
If you think about it in terms of motion, the string has to violate Nyquist at start. That was why I asked if a pickup would filter. Electric, not acoustic.
Jn
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if enough people are willing to pony up extra maybe, but the audit trail on hires is far from transparent. Certainly as far as dynamic range goes we've been going backwards for the last 35 years.
If it's not in the sleeve notes or an interview somewhere or on the labels website it's very hard. Which is why almost no one appears to want to list recording that use extended bandwidths.
I kept them all. Unfortunately I lost my E/M book.
I have had to go into all of them one time or another for my current employ, even the fluids book, metals, statics and dynamics, semiconductor physics, optics..
However, I will NEVER crack open my thermodynamics book. I stil get nightmares..
Jn
If you start a sine wave instantly, that violates nyquist. Even if you start at the zero crossing.
I'm just the messenger.
Jn
I like the thought experiment. My take on this is as follows. A sudden switch from off to a random point on a sinodial signal will introduce a wide spectrum noise. This is because it is effectively a impulse, transitioning into a continous signal. The onset of the signal is marked by a sharp peak in the first derivative.
A string being plucked represents a special case where this impulse does not occur. The reason is because the signal does not start at a random point, but at one of the two points where the first derivative of the signal is zero.
So to be perfectly clear: the plucking of a string per se does not violate nyquist
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A couple of throw away comments seem to have caused you some concern Jakob. FWIW I'm with Scott. It's on record here that John does keep repeating the same old stories. Why aren't we talking about great recordings being made NOW. Surely it can't be that there is nothing?
On the microphone side Demian has noted that Keith Johnson of Reference recordings has 50 year old microphones some of which can reach 30khz. He records at 176.4kHz 24 bit so you know that if you buy the RR hires it was at least recorded hires. For me the HDCD release is plenty good enough. However no one seems to have any link to any mainstream releases where everything was done on high bandwidth microphones. This might suggest that the music industry doesn't care and the consumer even less. A cymbal close miked with a small capsule does not a recording revolution make. But when someone strongly claims that lots of recordings are using these wonder mikes this needs to be tested. It was and found wanting.
But I did note an award winning hires blues recording...