John, I think you have to think a bit longer about my #798. It is not about position but about acceleration. In the case of a plucked string, nothing accelerates at a faster rate than when the string is just vibrating steady state. In case of a random jump into a signal, there is this rapid accelation=impulse. Plucking a string is the one excpetion where you don't get this impulse.
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Well John, I understand what vac is saying, I don't understand what you are saying, so your message isn't getting through, sorry 🙂
I haven't yet, but if I ever get time I want another go to defeat it. I find one of the forms of the second law a beautiful way of saying 'you lose' 🙂
Of course the whole sytem needs enough BW. The string motion needs to accelerate frome zero, hows that automaticaly violate Nyquist? If your talking electric guitar, think about the 1 fullrange driver in most guit amps, how much BW will that have?
electric guitars are a mono source that is pan potted, image and soundstage are mixing desk constructs. Just checking and seems that classical guitar is generally recorded with a single mic as well.
As Demian noted and I forgot DPA is essentially the B&K for recording mics. One of their most popular is the DPA 4006 with a good balance of noise and FR, 20 - 20k +-2dB, 14dBA noise. This is about what you get with an ~1/2" diaphragm. I would note this is an electret capsule so no external bias and far more user friendly.
B&K capsules are all metal and 200V bias for a reason, they can be calibrated and stable to NIST traceable standards as instruments, you pay for that.
Think of a pendulum. Hold it at it's maximum excursion and let go. Now, one cycle later, it is exactly where it was when you let go, and it is also at the same velocity the instant you let go, zero. If you recorded the position, velocity, and acceleration from let go, it is the exact same as one cycle later, you can't tell the difference. Same with a string.
And yes, a single driver BW is mud. Hence my question regarding how it is recorded. Mic the amp, I tend to doubt mic BW is important.
Jn
Not knowing much about plucked strings i googled it. I know a bit more, but it seems that exact result of a plucked string is varied.
This from a 2nd yr uni course (hamilton.edu):
And a couple interesting graphs (E4 is 330 Hz):
Where the sting is plucked makes a difference:
A derivation of the plucked string (looks like from the typewriter days): https://newt.phys.unsw.edu.au/music/people/publications/Fletcher1976d.pdf
And another with some animated gifs: The Vibration of a Fixed-Fixed String
dave
This from a 2nd yr uni course (hamilton.edu):
And a couple interesting graphs (E4 is 330 Hz):
Spectrum of plucked string sound of a classical acoustic guitar, open string E 4 . Spectrum zoomed to a single partial is shown in the subplot.
Where the sting is plucked makes a difference:
Spectrum of string plucked one-fifth of the distance from one end [10].
A derivation of the plucked string (looks like from the typewriter days): https://newt.phys.unsw.edu.au/music/people/publications/Fletcher1976d.pdf
And another with some animated gifs: The Vibration of a Fixed-Fixed String
dave
If the abrupt start is filtered, the leading edge will suffer.
If the leading edge is used for localization, image suffers.
Jn
The acceleration is maximum at let go, and when the string is at the limits of it's travel. It is at maximum velocity when it is exactly in the center of travel.
Ps. Planet 10, interesting stuff. I would assume that spectra is integrated spectra. I assume that as time goes on, the spectra drops towards the fundamental, all the other lines decay quickly.
Jn
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What was it Bill?
I looked through my music library and I can’t tell what the provenance of the hi-res really is. I could list a bunch of ones I think sound good but it’s fairly useless until you actually buy a download with documented roots.
a lot of the tracks I find exceptionally well recorded are 16/44.1 😱
Agreed, but what would integrate? I'm thinking the pickup is a velocity measuring device, no?
Jn
Break The Chain | Doug MacLeod | Reference Recordings
Exactly Like This | Doug MacLeod | Reference Recordings
back in the early 80s when people were exploring what digital could do there were a lot of really high quality recordings done, many on soundstream. Sadly bar the Telarc releases a lot of them were not great music, but sure a few people still have a 'flim and the BB's' CD they bought at a hifi show and keep as a guilty pleasure or test disc. Done properly 16/44.1 can be superb. As George pointed out as soon as you start exploring the DR capabilities of digital things become almost unlisteable in the home environment, unless you are Ed in his sealed bunker.
Yes, the leading edge will not be as abrupt, but how abrupt does is have to be?
Re, localisation, do you mean ITD?
Just popped up on one of my news-feeds. On recording mics. I assume 4 more parts before.
Understand Recording #5 Microphones | DSD-Guide.com
dave
Understand Recording #5 Microphones | DSD-Guide.com
dave
You said it...not me.😀
And I have no idea how leading edge filtering affects how we localize. I do know 5 uSec ITD, but that doesn't mean 5 uSec edge change.
So the answer is a big fat...I dunno..
Jn