and indeed they do.... only one problem, if you DSP model an amp to sound like a Marshall stack (or VOX 60 or Fender Bassman), every amp you add this DSP magic to sounds like the SAME Marshall stack., or VOX 60, or Fender Bassman. all of these classic amps each had their own unique sound, and you could play two Marshall stacks side-by side, and no two sounded identical. they might sound real close, but not identical. this was due to the use of components, many with tolerances of 10% (or more, because 20% tolerance resistors weren't uncommon in the 50's and 60's), and carbon composition resistors also contributed unpredictable nonlinearities and noise to the signal. i've worked in music stores, and guitarists can be very picky about the sound of an amp.this can be designed into the audio itself!
Yep, you can even post process THAT in.and you could play two Marshall stacks side-by side, and no two sounded identical. they might sound real close, but not identical. this was due to the use of components, many with tolerances of 10% (or more, because 20% tolerance resistors weren't uncommon in the 50's and 60's), and carbon composition resistors also contributed unpredictable nonlinearities and noise to the signal. i've worked in music stores, and guitarists can be very picky about the sound of an amp.
Except that CD Players have a steep roll-off filter for that exact reason, as is standard in D2A systems.
Sceadwian said:People seem to forget something about audio with these increased sampling rates, the sampling rate doesn't only effect the frequency reproduction ability of the audio but the phase reproduction. What relies on a high definition of phase reproduction? Multi-channel (positional) audio. The BASEMENT spec for Blueray audio sampling is 48khz, and it goes up to 192khz.
...
Mr RB, you must have missed the entire phase reproduction section...
NOTE: This was drawn as the theory before I actually built it, the final circuit was close but with some extra components.
I will find the the Video of it in operation
The Distortion was crazy the fidelity was low, but it one of those things I built because I wondered if it was possible.
The power came from a 2HP AC motor that would belt drive both alternators at the same RPM.
The faster it was spun the more the 'amplification' haha.
Will also dig up some of my old Mag Amp projects.
I will start a new thread for these.
Nigel, I didn't say anything about phase error.... I said PHASE REPRODUCTION. The simply delay of a 22khz signal with sufficient resolution to provide fine aural positional details needs to run at WELL more than 22khz for a 22khz signal. If the phase reproduction is kept at the same rate as the sampling audio the positional quality of the audio at it's absolute frequency limit is limited to left or right only with no leaning! As the frequency goes down from the sampling rate the left/right positioning becomes more highly detailed.
A 22khz signal in a 192khz sampling range for delayed channels has at least 8 possible physically perceived positional ranges from left to right. At 22khz it has only left or right.
This is basic math, work it out.
I still feel the problem lies with the irons, I just can not see a single transformer capable of handling that broad a frequency range without some adverse effect on the audio stream.
[rant]
speakers can compeltely change a system, for better, or worse, thats up to the persons perception. [/rant]
BT
No question, that's the second largest offender for buggering up the sound. Speakers need to be about 8 feet or more from all walls, floors, and celings just to minimize the resonances. Compensating equalizers are cool, I have one (don't use it anymore). If I still had good hearing, I'd probably buy one of those digital ones.Don't forget the room acoustics!
Speakers need to be about 8 feet or more from all walls, floors, and celings just to minimize the resonances.
I don't care what kind of equalizer you use, you can't fix bad acoustics in a room, you might be able to slightly compensate for the worst of it, but you can't fix it, it's just the natural resonances of the physical space. I'm not sure if 350 is worth the price, but to each their own! I'm sure not gonna tell anyone what to spend their toy money on =) Personally if I want really good quality audio I'd buy a pair of studio quality monitor headphones. Even in a bad room slight tweaking of the channel delays on a typical surround system will get it to the point where it's pleasing.
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