Here we go again, I promised myself not to get involved in "audiphile" discussions again but...
If I tried to make a 20khz sound with 40khz sampling, I wouldn't hear a thing. Take two samples of one wave equidistant, and you get the middle and the beginning of the wave, which are always the same value. At 4X the sampling, you get a saw wave (or worse, a muffled trapazoid if you phase shift 45 deg). So, if you do 20Khz at 80Khz, you're still screwed. How many points do you need on a wave to make it smooth? I would say at least 8 at high frequencies (and that has a chance of only getting you about 66% of the power). That's about 160Khz for 20Khz sound.
But if you use a 40.00001 kHz and a brick wall low pass filter at 20 kHz you will get the original wave.
The only real reason to higher than 2X the audible range is that it is difficult to make brick wall filters. In theory a "muffled trapetzoid will still represent the original wave correctly. Nyquist was pretty clear about this. =).
Linear PCM is just such a waste of space above 44kHz sampling frequency. Everytime you double the sampling frequency you double the amount of data but you only get one octave more information. So if the signal is music, frequency shouldnt be linear. Wavelets for instance are much more efficient at storing data but much more complex to implement. 192x32 is just a brute force way of saying: I cant afford to make decent filters.
Your "power-calculation" just shows that you have never taken a signal processing class in your entire life. But thats ok, those classes are hard.
I learned everything I know about computing on demand (CoD) by watching Star Trek. Let me show you two examples:
1. Without CoD: Captain Archer is hiding in the cargo bay and devises a plan to retake control of the ship. But it requires that enviromental control is rerouted to sickbay and that can only be done from the bridge where the evil mad man is.
2. With CoD: Worf remodulates the phasers to match enemy shields and devices a new search pattern for the torpedoes by pressing 3 buttons on the console in front of him.
CoD is when stuff works without any fuss and there are no problems. They simply want everything to be as in ST:TNG.
There comes a time in every software development project where the best thing to do is to delete all code and start again, perhaps you are there now?
But that is usualy when a student has started coding without knowing a squat about how to solve the assignment and realized after a couple of hundred lines of code.
The problem with puting a huge laser on the moon is that if you want the spot on earth to be smaller then say, texas, the laser on the moon have to have a very very large aperture.
Some aspects of lasers and the distance to the moon can be found here
--
So all I have to do is figure out the eigenfunction (or eigenessay) to the system and my grades will soar. It would be a good thing if my math skills would help me gett better grades in litterature.
Microsoft wont make any money from the hardware, just as all the other console manufacturers they will make their money from licencing fees. I dont see how they can do that when people play old PSX games on their hardware.
The Xbox seems nice but I dont see what It can do that my present computer cant.
This stuff is perfectly fine IF it does not catch fire. If it does, it forms gaseous hydrofloric acid - one breath and you'll be dead within about 30 seconds.
set HUMOR=1 If you computer catches fire, HF(g) is the least of your problems, burning pcb will kill you much faster, unless the hot gases toasts your lungs first. Not to mention the entire building crashing down on top of you.
We have no such computers on campus so that is always from the outside. Ktelnet has a built in ftp and pop klient and you dont have to be admin on an NT machine (Its mostly microsoft users that has these problems) to run it, so we recomend that program.
Some companies are so paranoid that the wont allow users to telnet to the outside at all, and thats probably the largest problem for our students (they tend to work at such companies after they graduate)
Speaking as a system administrator for a college network with 18000 users I would say the main threat is from inside the network. We have banned all forms of unsecure comunications on our network (telnet, ftp, pop) and the amounts of "hackers" an malicious behavior has decreased tremendously.
Kerberos pretty much solves all our problems (almost)
NOTE: all users can still telnet and ftp of course, but they have to use Ktelnet, ssh or such
The pentium processor was the thing that started the trend away from model number names for techstuff and gagets. Now you can see it in cars, PDA's 3Dcards etc. But now they are going back to that trend. To avoid that they could call it Pentium IV, the voyage home.
As usual Im way of when I post and eat at the same time.
Too bad they outlawed halon systems. Outlawed? When? By whom? And why, are they too dangerous?
They are outlawed by the UN i think, they are realy bad for the ozone-layer. But they are the best in firefighting. I have seen a demonstration where they placed a bomb inside a van and a halon system in the ceiling of the van. The halonsystem stopped the explosion dead in its tracks halfway throug the van.
because I found an abit case with an noiskiller PS that actually works. I only have one hdd in my linux box, no cd and no fancy graphics board (2 matrox cards instead). When I discovered that my new case was so quiet I underclocked my k6II 300 to 280 and lowered the voltage. With the biggest heatsink I could find It runs realy cool whithout a fan. The only thing that makes noise is the hdd and that only rattles when it is being read from. Lot of ram fixes that (*g*). I also found that the disk is being used much less when Im in single user mode. I live in a small room in a dormatory and I can have my computer standing next to my bed powered on 24/7 whitout a single problem.
Riiiiiiight. Seen any funny lights in the sky lately?
I just have to put my old nokia 8110 next to my Sun ultra1 to witness some really flaky stuff. And since I am taking an astronomy class This summer: Yes I have seen some funny lights in the sky lately, A couple of kvasars and an close flyby of an small asteroid, anything else?
Wenn I said controls I ment control system or electronics or whatever you want to call it.
In A modern train by ABB all the redundant electronic subsustems (ALL) are bit-inverted from their counterparts so that they wont suffer the same from interference.
I used to work at an small airport here in sweden when one of the pilots told me an amusing story of a buissniesman who when he rebooted his laptop made the autopilot turn. No wavelan and no GSM was involved.
Yes but you dont need to induce the power into the enginge. Mess up the controls and you could get a freghttrain to run amok. It has been done with planes ( cellphones, you know the rest )
You shouldent underestimate the strangeness of things that can happen when dealing with HFEM radiation.
Yes, build large bricks and then build a life size house from them.
A word of caution is that you cant build anything ordenary larger than 20-30 meters high or else it will be crushed by its own weigth. But you could use an finite amount of legos to build an infinitely high lego tower if you can manage to find those realy tiny pieces for the top.
das Ix
ahh, why does netscape shut down when i try to justify my coments:)
Personaly I dont need the paper manulas that ship with hardware, its usualy just a long description of how you plug in your powercord or fasten the screw to the case. But what I really want is the manuals of all old hardware to be online.
Everytime I find some old exotic hardware, like an old pentium motherboard, the paper manual is since long recycled but I still want to know how to flash the CMOS or disable the built in vibra sound chipset (or is it an sb16?).
Intel provides online technical documentation for olmost every pice of hardware they ever sold and thats great.
I would like to be able to find the tecnical reference manual for everything on the net, so I can se the specs for my toaster, or that old marantz reciever I found at the flea market.
I think its a good idea to sell stuff with a bare minimum of documentation. If you sell a big fat manual to thse who need it, we who dont need those huge gettin started books with everything we buy save trees and money, and they who do still has the option of getting one. If they buy an extra manual its a greater chance that they will actually read it before calling techsup (me).
This is due to use of the vector registers right? Then does it realy work on _all_ G4's. I seem to have some vauge memory that not all G4 cpu's have those registers.
We have an old Fuijutsu here at work, it does 40Mflops whitout the vector regisers enabled and 1500 Mflops with.... drool
My paranoya realy got to my when i noticed that I couldnt get a hold of a dvd-rom. I live in Stockholm, which is suposed to be the hotest it-region in europe and there isnt a singel DVD drive available in _any_ store in town. I can realy feel the MPAA breathing down my neck.
Id better go put some tape to form an X on my window.......
Ok so it wills till run at tv resolutions but at christmas 2001 I will have that kind of power on my linux-pda.
christmas 2001 is about 18 months from now so I guess AMD will be unveiling their >2GHz-line if Moores law still aplies, the X-box with a 600 MHz cpu will be a tad on the weak side.
I also wonder if they will stick with Nvidia as their sole supplier of graphics hardware, who knows if they are the best supplier in 18 months.
Slashdot Mirror
Ok, so spammers are using haiku. If we only could convince them that harikiri is a spamfilter prevention technique....
But if you use a 40.00001 kHz and a brick wall low pass filter at 20 kHz you will get the original wave.
The only real reason to higher than 2X the audible range is that it is difficult to make brick wall filters. In theory a "muffled trapetzoid will still represent the original wave correctly. Nyquist was pretty clear about this. =).
Linear PCM is just such a waste of space above 44kHz sampling frequency. Everytime you double the sampling frequency you double the amount of data but you only get one octave more information. So if the signal is music, frequency shouldnt be linear. Wavelets for instance are much more efficient at storing data but much more complex to implement. 192x32 is just a brute force way of saying: I cant afford to make decent filters.
Your "power-calculation" just shows that you have never taken a signal processing class in your entire life. But thats ok, those classes are hard.
I learned everything I know about computing on demand (CoD) by watching Star Trek. Let me show you two examples:
1. Without CoD:
Captain Archer is hiding in the cargo bay and devises a plan to retake control of the ship. But it requires that enviromental control is rerouted to sickbay and that can only be done from the bridge where the evil mad man is.
2. With CoD:
Worf remodulates the phasers to match enemy shields and devices a new search pattern for the torpedoes by pressing 3 buttons on the console in front of him.
CoD is when stuff works without any fuss and there are no problems. They simply want everything to be as in ST:TNG.
When i coach CS students i sometimes say to them:
There comes a time in every software development project where the best thing to do is to delete all code and start again, perhaps you are there now?
But that is usualy when a student has started coding without knowing a squat about how to solve the assignment and realized after a couple of hundred lines of code.
The problem with puting a huge laser on the moon is that if you want the spot on earth to be smaller then say, texas, the laser on the moon have to have a very very large aperture.
Some aspects of lasers and the distance to the moon can be found here--
So all I have to do is figure out the eigenfunction (or eigenessay) to the system and my grades will soar. It would be a good thing if my math skills would help me gett better grades in litterature.
Get your Gentus here:
ftp://ftp.funet.fi/pub/Linux/mirror s/g entus/
/ix
Just for the record I have an abit BP6 with no such problems. But SMP is always a bit "flaky" no matter what board yore using.
/ix
what? Solaris has a GUI?
Microsoft wont make any money from the hardware, just as all the other console manufacturers they will make their money from licencing fees. I dont see how they can do that when people play old PSX games on their hardware.
The Xbox seems nice but I dont see what It can do that my present computer cant.
/das Ix
This stuff is perfectly fine IF it does not catch fire. If it does, it forms gaseous hydrofloric acid - one breath and you'll be dead within about 30 seconds.
set HUMOR=1
If you computer catches fire, HF(g) is the least of your problems, burning pcb will kill you much faster, unless the hot gases toasts your lungs first. Not to mention the entire building crashing down on top of you.
/das Ix
We have no such computers on campus so that is always from the outside. Ktelnet has a built in ftp and pop klient and you dont have to be admin on an NT machine (Its mostly microsoft users that has these problems) to run it, so we recomend that program.
Some companies are so paranoid that the wont allow users to telnet to the outside at all, and thats probably the largest problem for our students (they tend to work at such companies after they graduate)
/das Ix
Speaking as a system administrator for a college network with 18000 users I would say the main threat is from inside the network. We have banned all forms of unsecure comunications on our network (telnet, ftp, pop) and the amounts of "hackers" an malicious behavior has decreased tremendously.
Kerberos pretty much solves all our problems (almost)
NOTE: all users can still telnet and ftp of course, but they have to use Ktelnet, ssh or such
/das Ix
But you cant jump over grand canyon in two steps.
/das Ix
The pentium processor was the thing that started the trend away from model number names for techstuff and gagets. Now you can see it in cars, PDA's 3Dcards etc. But now they are going back to that trend. To avoid that they could call it Pentium IV, the voyage home.
As usual Im way of when I post and eat at the same time.
/das Ix
A search for '"Steve Mann"' returns 4456 results.
A search for '"Steve Mann computer"' returns 6 results.
A search for 'Steve Mann comupter' returns 23693 results from google.
Be careful wiht numbers, they want to decieve you.
Too bad they outlawed halon systems.
Outlawed? When? By whom? And why, are they too dangerous?
They are outlawed by the UN i think, they are realy bad for the ozone-layer. But they are the best in firefighting. I have seen a demonstration where they placed a bomb inside a van and a halon system in the ceiling of the van. The halonsystem stopped the explosion dead in its tracks halfway throug the van.
because I found an abit case with an noiskiller PS that actually works. I only have one hdd in my linux box, no cd and no fancy graphics board (2 matrox cards instead). When I discovered that my new case was so quiet I underclocked my k6II 300 to 280 and lowered the voltage. With the biggest heatsink I could find It runs realy cool whithout a fan. The only thing that makes noise is the hdd and that only rattles when it is being read from. Lot of ram fixes that (*g*). I also found that the disk is being used much less when Im in single user mode. I live in a small room in a dormatory and I can have my computer standing next to my bed powered on 24/7 whitout a single problem.
Riiiiiiight. Seen any funny lights in the sky lately?
I just have to put my old nokia 8110 next to my Sun ultra1 to witness some really flaky stuff. And since I am taking an astronomy class This summer: Yes I have seen some funny lights in the sky lately, A couple of kvasars and an close flyby of an small asteroid, anything else?
Wenn I said controls I ment control system or electronics or whatever you want to call it.
In A modern train by ABB all the redundant electronic subsustems (ALL) are bit-inverted from their counterparts so that they wont suffer the same from interference.
I used to work at an small airport here in sweden when one of the pilots told me an amusing story of a buissniesman who when he rebooted his laptop made the autopilot turn. No wavelan and no GSM was involved.
Yes but you dont need to induce the power into the enginge. Mess up the controls and you could get a freghttrain to run amok. It has been done with planes ( cellphones, you know the rest )
You shouldent underestimate the strangeness of things that can happen when dealing with HFEM radiation.
Yes, build large bricks and then build a life size house from them.
:)
A word of caution is that you cant build anything ordenary larger than 20-30 meters high or else it will be crushed by its own weigth. But you could use an finite amount of legos to build an infinitely high lego tower if you can manage to find those realy tiny pieces for the top.
das Ix
ahh, why does netscape shut down when i try to justify my coments
Personaly I dont need the paper manulas that ship with hardware, its usualy just a long description of how you plug in your powercord or fasten the screw to the case. But what I really want is the manuals of all old hardware to be online.
Everytime I find some old exotic hardware, like an old pentium motherboard, the paper manual is since long recycled but I still want to know how to flash the CMOS or disable the built in vibra sound chipset (or is it an sb16?).
Intel provides online technical documentation for olmost every pice of hardware they ever sold and thats great.
I would like to be able to find the tecnical reference manual for everything on the net, so I can se the specs for my toaster, or that old marantz reciever I found at the flea market.
I think its a good idea to sell stuff with a bare minimum of documentation. If you sell a big fat manual to thse who need it, we who dont need those huge gettin started books with everything we buy save trees and money, and they who do still has the option of getting one. If they buy an extra manual its a greater chance that they will actually read it before calling techsup (me).
Das Ix
This is due to use of the vector registers right? Then does it realy work on _all_ G4's. I seem to have some vauge memory that not all G4 cpu's have those registers.
/das Ix
We have an old Fuijutsu here at work, it does 40Mflops whitout the vector regisers enabled and 1500 Mflops with.... drool
My paranoya realy got to my when i noticed that I
couldnt get a hold of a dvd-rom. I live in Stockholm, which is suposed to be the hotest it-region in europe and there isnt a singel DVD drive available in _any_ store in town. I can realy feel the MPAA breathing down my neck.
Id better go put some tape to form an X
on my window.......
Das Ix
Ok so it wills till run at tv resolutions but at
christmas 2001 I will have that kind of power on my linux-pda.
christmas 2001 is about 18 months from now so I guess AMD will be unveiling their >2GHz-line if Moores law still aplies, the X-box with a 600 MHz cpu will be a tad on the weak side.
I also wonder if they will stick with Nvidia as their sole supplier of graphics hardware, who knows if they are the best supplier in 18 months.
/das Ix