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Tonight my piano has gained a low white noise from the speakers. I think that it also also before the same noise but it was really low and i have thought that was like a small fan but now is pretty noticeable. It began when i start to use external speakers using the headphone plug. Anyway the sound is not distorted but loud and clear.
If you only hear it on external speakers, then it could be a noise internal to those speakers (and the amplifier, which may be built-in to the speakers).
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If you are using powered speakers, turn up the volume on the piano and turn down the volume of the speakers. The lower the level of the source, the higher the noise will hear (for any given output volume).
If you are using powered speakers, turn up the volume on the piano and turn down the volume of the speakers. The lower the level of the source, the higher the noise will hear (for any given output volume).
Internal speaker has the noise.
Originally Posted by Pete14
....and why are we so certain that the noise is white? For all we know it could be any colour......grade!
The noise is similar to the white one, do you need a recording to make some considerations?
Pete, it is hard to tell if you are just kidding or serious, most probably the former. TBH, too much OT kidding lately, IMO (like spice, a little is good, too much spoil it).
Anyway, they use color descriptions for some types of noise, not sure why. On white noise theoretically all frequencies have the same content (of course, you need to sample the noise for an extended length of time to get that). On pink noise, high frequency content is attenuated. If memory serves, pink noise was used to make ajust to PA systems to correct venue acoustics.
I am typing this from memory, I am pretty sure I will be corrected if I typed something dead wrong.
I’m still confused, for you say a ‘recording’ can confirm the colour, but you see, I can’t ‘hear’ colour, I can only see it.
Here's a comparison of white noise and pink noise. It should answer all your noise questions, so that you don't need to introduce any additional unwanted noise to our serious noise discussion:
....and why are we so certain that the noise is white? For all we know it could be any colour......grade!
"White noise" is a technical term with a commonly accepted definition in signal processing. It refers to noise which has equal energy at all frequencies. It's one disctinctive type of noise, other extremes are pure sinus (all energy concentrates on one single frequency), or silence (no energy at all). The easiest way to generate white noise is to convert a completely random input source into a waveform. "Static" on an old-school radio, or the "snow" on an old b/w TV (when not tuned to a channel) is very similar to white noise, although it often isn't random enough to hold up against close inspection.
I believe it's called "white" because if you where to do the same thing with an emissive light source, you would end up with white (rather than some specific color). Of course this is only a naive comparison. In reality, human color perception is quite a bit more complex. Actual perception of something as white depends greatly on context.
I’m still confused, for you say a ‘recording’ can confirm the colour, but you see, I can’t ‘hear’ colour, I can only see it.
Here's a comparison of white noise and pink noise. It should answer all your noise questions, so that you don't need to introduce any additional unwanted noise to our serious noise discussion:
I believe it's called "white" because if you where to do the same thing with an emissive light source, you would end up with white (rather than some specific color). Of course this is only a naive comparison. In reality, human color perception is quite a bit more complex. Actual perception of something as white depends greatly on context.
I think the white noise was inspired by the white light source, but the white light corresponds to a black body at a given temperature and the density of power per frequency is not constant. Then the « white noise » (constant power density) is not so white.
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I know I’ve been told to take my noise elsewhere, and I will, but if I may be allowed to make one last noise before I depart:
It seems like I was right all along, ye, for we cannot prove unequivocally that the noise in question is white; and, as our own Frederic has concluded, “the white noise is not so white”.
I shall now leave; a dark-brown noise, a broken purple flower, a transparent odor, all wrapped into one huge pile of......love!
Originally Posted by Frédéric L
Originally Posted by pppianomarc
Then the « white noise » (constant power density) is not so white.
+1. And that's a strange thing, to suddenly start up.
It might also be power-line noise, that's getting through the power-supply's filtering.
I'd start by unplugging _everything_ from the DP, except its own power supply.
Then, if there's a "factory reset", do a factory reset.
. . . Is the noise still there, with the volume control turned all the way down?
. . . . . If it's gone, the factory reset fixed _something_;
If it's still present, unplug the DP's power supply from its outlet,
. . . and plug it in to a different outlet, using a long extension cord . . . if necessary.
. . . Is the noise still there?
. . . If it's present, I'd suspect a problem either inside the DP, . . . or in the power supply.
. . . If not, there's noise coming from the original AC outlet, . . . . . and getting into the power supply, . . .. . and not being filtered out (which the power supply should do).
. . . Or the DP is genuinely broken, and needs professional attention.
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