Right, I agree with the cool stuff you could do with nonlinear bias, but it does seem like it'd be done for the novelty/intellectual exercise than for making an audibly better amp (or even simply a more reliable ops). For that kind of controls effort, a hypex challenger would draw a better yield.
Edit to add: no, that wasn't an application I was contemplating, either. Credit where credit is due.
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Based on the schematics you linked, I believe we may have a fundamental disagreement on what "non-switching" means. Never mind.
Yes, it would probably do the job, but 50 quid a pop is rather steep. I'll take a raspberry running Linux at 20 quid any day over this overpriced device.
Mind you, this is not an arduino, but the Intel dev. board rev. 2 rebranded.
I doubt there's any kind of a redundancy... They're just trying to say "we're not pricks" as they act just as thus...
Sadly Tannoy will probably go down the shitter after this because it'll go from being one of Evil Uli's autonomous money generators to another entity under his punitively run abysmal hells.
I got one to take a look at. Pinout is great (all the ports are grouped together, unlike some controllers) but . . . only two interrupts! You've got a pattern recognition interrupt but that's hardly a replacement for interrupts on (almost) every pin that you get with a typical ARM device. I'll be sticking to ARM controllers. I think Arduino is ok for basic control applications like turning lights on and off, looking at switches, polling inputs etc.
For those of you looking for a decent and powerful dev platform, take a look at mbed.org
Apropos nothing of present conversation: the Google doodle for April 30th is Claude Shannon, who's theorems people are still trying to violate to no success.
He would have been 100 today.
Yep - I saw that - 100 today. I think he was in his early thirties when he wrote https://en.wikipedia.org/wiki/A_Mathematical_Theory_of_Communication
Some clever people out there.
Apropos nothing of present conversation: the Google doodle for April 30th is Claude Shannon, who's theorems people are still trying to violate to no success.
He would have been 100 today.
Blimey.. Time flies. I remember learning that stuff in the 70s... Then writing some of the first high speed dsp modem code in the 80s, essential maths!
His daughter was a neighbor for a while, she introduced herself by name and I immediately said you must be Claude's daughter due to the remarkable family resemblance.
EDIT - Sorry I meant granddaughter
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JC ---
I'm going thru an old file cabinet of saved stuff..... on a yellow note pad I have written these notes:
The auditory sensitivity to harmoics goes up by almost the cubed (actually 2.7) of the harmonic number. IE. 3rd harmonic is 3^3 (or 3^2.7) or 27 times more sensitivity than to fundemental. 11th harmonic is 100 times or 40db more easily heard than 2nd harmonic. This is about 16.2db per octave rise in sensitivity from 2nd to infin n of harmonic (weighting).
IEEE (1986) transactions on Instrumentation and Measurment Vol IM-35, No 2, June 1986 by Hong Yue Lin
[where Fo is <10KHz re 90db spl pure single tone]
-RNM
I'm going thru an old file cabinet of saved stuff..... on a yellow note pad I have written these notes:
The auditory sensitivity to harmoics goes up by almost the cubed (actually 2.7) of the harmonic number. IE. 3rd harmonic is 3^3 (or 3^2.7) or 27 times more sensitivity than to fundemental. 11th harmonic is 100 times or 40db more easily heard than 2nd harmonic. This is about 16.2db per octave rise in sensitivity from 2nd to infin n of harmonic (weighting).
IEEE (1986) transactions on Instrumentation and Measurment Vol IM-35, No 2, June 1986 by Hong Yue Lin
[where Fo is <10KHz re 90db spl pure single tone]
-RNM
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but why not read, reference actual Psychoacoustics textbook Masking info (where you would see by 90 dB SPL upward frequency masking is strong, doesn't fall to the threshold in quiet)
plus on the EE side it really says nothing actionable - merely competent, acceptable audio circuits don't generate 11th harmonic above noise floors
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Dont build a straw man out of this..... No one is talking about 11th. just an example of sensitivity using the formula. Apply to 2,3,4, 5th harmonic, as you like.
There may or may not be masking. Depends on freqs./levels. Another subject.
And there is the sensitivity to the harmonics of the acoustic output as well to consider (loudspeakers) besides electronic circuits.
-RNM
There may or may not be masking. Depends on freqs./levels. Another subject.
And there is the sensitivity to the harmonics of the acoustic output as well to consider (loudspeakers) besides electronic circuits.
-RNM
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Arduino environment is really great for elementary/middle/high school (sorry, I don't know the equivalent terminology in other countries) students to get their feet wet and excited about cool things you can do with computers. Definitely not the fanciest of hardware, but very good within its educational domain.
(Not that I saw you as complaining)
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