No, no, and no, I'm afraid. Not in analogue anyway, unless you can isolate the section responsible for the odd harmonics and use feedback. A common strategy is to use an SS amp with lots of feedback, and then add a single-ended triode before or after.
Does a square wave have any even harmonics?
The most musical combination of harmonics depends on the music. A declining mix of 2H and 3H is arguably most desirable if some harmonics must be present.
Does a square wave have any even harmonics?
The most musical combination of harmonics depends on the music. A declining mix of 2H and 3H is arguably most desirable if some harmonics must be present.
Yes, square waves may have even order harmonics. Duty cycle of square waves is equal to the number of even harmonics, from which above all even harmonics are absent.
You can not build such device that adds to any input signals even order only harmonics, but it is not needed. There are no desirable distortions in sound reproduction, it is a myth caused by misunderstanding. But there are desirable distortion in sound synthesis that is completely different application of electronics.
And there is less nasty behavior on overload that is represented by gradually bent transfer curve. When slightly overloaded it will give distortions of low order. The higher you overload it, the higher is order of distortions. It is about overload, of course!
You can not build such device that adds to any input signals even order only harmonics, but it is not needed. There are no desirable distortions in sound reproduction, it is a myth caused by misunderstanding. But there are desirable distortion in sound synthesis that is completely different application of electronics.
And there is less nasty behavior on overload that is represented by gradually bent transfer curve. When slightly overloaded it will give distortions of low order. The higher you overload it, the higher is order of distortions. It is about overload, of course!
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One way to minimize any harmonics, and especially higher order harmonics is to limit the preceeding stage's harmonic amplitude as well as output stages. In otherwards keep the distortion level down before the output stage, as well as the output stage. As such, when 2nd and 3rd harmonics combine, 4th, 6th, and 9th orders etc will be minimized.
According to RCA Radiotron Designers Handbook, 26 engineers, 1960, the 7th harmonic is considered the first dissonant harmonic, then 9th order, "fundamental frequency is taken for convenience as 250hz".
Cheers.
According to RCA Radiotron Designers Handbook, 26 engineers, 1960, the 7th harmonic is considered the first dissonant harmonic, then 9th order, "fundamental frequency is taken for convenience as 250hz".
Cheers.
50% duty cycle is assumed unless otherwise stated.
SE triode can come close if deliberately arranged for that purpose.
Not quite the same point. "pleasing", "musical", and "desirable if some harmonics must be present" are all quite different from "desirable". They are especially different from "desirable distortions in sound reproduction" which is obviously a direct contradiction.
Misunderstanding on the part of reproductionists. Fidelity cannot be reduced to reproduction.
What is desirable or otherwise for synthesised sound is the same as for any other sound. Distortion is departure from the original. All sound sources contain harmonics, including synthesisers and traditional musical instruments. Why should it be OK to distort one, and not the other?
sorry, my statement about "square waves generator but with even order harmonics only" is only an imagination, we already know that square waves generator is dominated by odd order harmonics, i post that way because i cant imagine such a waves generator that generates 2nd,4th,6th,and 8th harmonics, not 3rd,5th,7th,and 9th harmonics.
Hey, I have just discovered something new: I am a "reproductionist"! Is this the new name for what used to be called "hi-fi enthusiast" i.e. someone who wants to reproduce sound with as little change as reasonably possible? Does that mean that those who prefer changes should henceforth be known as distortionists?PlasticIsGood said:
I think you misunderstand Wavebourn's point. In sound synthesis, 'distortion' is part of the instrument and presumably required to get a particular sound. In sound reproduction, distortion is generally unwanted unless it can be shown that it compensates for some other unavoidable distortion.
A true square wave is made up from the fundamental and ONLY the odd harmonics. If there are any even harmonics then it's not a square wave.
Not always. It depends on the DC level. If it is centered on 0V, then is true, but if not it has Cd term, so, even harmonics are present.
Regarding DC as an even-order term may be a way of exhibiting the difference between an engineer and a mathematician. Is zero an even number?
A triangle wave, with equal up and down slopes, contains only odd harmonics as you can make it by integrating a 50:50 square wave. A sawtooth contains all harmonics.
A triangle wave, with equal up and down slopes, contains only odd harmonics as you can make it by integrating a 50:50 square wave. A sawtooth contains all harmonics.
Not sure - I would need to check (I am not a mathematician), but I would have thought that a fixed DC offset would by definition not have harmonics present.
No, a number different from zero obviously can´t be zero, but the amplitude of a Fourier series (amplitude of harmonic) do may be zero. I´m Electronic Engineer.
It is possible to do harmonic cancellation to some degree by using gain stages with different harmonic distribution, and adjusting the bias point of each stage to maximize the interaction of the two.
That said, I have only seen this with triode driving pentode (6N1P and 6P41S), and it is rather coarse adjustment wise.
George (TubeLab)has reported the same effect.
That said, I have only seen this with triode driving pentode (6N1P and 6P41S), and it is rather coarse adjustment wise.
George (TubeLab)has reported the same effect.
Glad to be of service, but your discovery requires more thought, as you clearly haven't made sense of it yet.
Without misunderstanding, there is no point.
Distortion of what? Perhaps some notional waveform is "distorted" to produce the output. That is the same for all musical instruments. That's why they don't all sound the same.
Perhaps reproductionists have the same problem with their ears when listening as they have with their eyes when reading.
Fidelity cannot be reduced to reproduction.
If reproduction were the objective, it would be a tautology to say that distortion is unwanted, and "compensation" would simply make no applicable sense. The reproductionist argument is essentially unassailable, in the sense of ontological.
Zero distortion would be a legitimate, albeit alienating, presentation. It is not achievable for most people, and a close approximation has only recently become possible for a rich elite.
Authentic presentation has always been possible for the majority. What could be higher fidelity than that? Sympathetic listeners have always played a part in defining the truth. Reproductionists, on the other hand, are parasites.
But we digress.
Very true. I am afraid there is no point in attempting to explain you something.
That s it , a waveform frequency or phase is modulated by another
waveform resulting in a distorted signal , a principle used in FM or phase
sound synthesis , most notably in Yamaha s DX7.
Do you mean sawtooth, a-symmetric waves? Yes, they are rich of all harmonics. But symmetric triangle waves have no even order harmonics at all.
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