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White noise
#3050226 11/27/20 05:40 PM
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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.

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Re: White noise
QuasarPiano #3050239 11/27/20 06:36 PM
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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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We got both kinds of music: Country and Western!
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Re: White noise
QuasarPiano #3050327 11/28/20 01:48 AM
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"White noise" ? Sounds like hiss, no structure at all ?

What do you mean:

. . ."not distorted but loud and clear" ?

There are some kinds of digital noise that I've heard from networks and USB cables that sounds sort of like white noise, but not quite.

The usual way to find the source is to start unplugging devices, and cables, until the noise disappears.

. . . And then put things back together, noticing when the noise re-starts.


. Charles
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Re: White noise
QuasarPiano #3050336 11/28/20 02:59 AM
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Quote
."not distorted but loud and clear" ?
I mean that the sound of the note are good but in background there is the noise

Re: White noise
QuasarPiano #3050347 11/28/20 04:46 AM
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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).

Re: White noise
QuasarPiano #3050369 11/28/20 06:51 AM
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....and why are we so certain that the noise is white? For all we know it could be any colour......grade!

Re: White noise
Pete14 #3050378 11/28/20 07:30 AM
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Originally Posted by johnstaf
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?

Re: White noise
QuasarPiano #3050397 11/28/20 08:47 AM
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Originally Posted by QuasarPiano
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?

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.

So I ask, can you make a video so that we can properly ‘see’ the colour!

Am I missing something here?

Re: White noise
Pete14 #3050399 11/28/20 08:56 AM
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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.


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Re: White noise
QuasarPiano #3050403 11/28/20 09:15 AM
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You know, some people like it spicy; for me, there can never be too much spice!


But seriously, why do we have to attach a colour to noise?

I don’t believe that noise should be entitled to a colour, for it’s an annoying thing that should be eradicated!

I know this from experience, for as I’m typing this, my tinnitus is driving me crazy.

So I ask, is tinnitus worthy of a colour? I don’t think so, sir!

Colour should be reserved for beautiful, inspiring, and tangible things, but I digress.

Re: White noise
QuasarPiano #3050423 11/28/20 10:04 AM
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Originally Posted by Pete14
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:


Re: White noise
EVC2017 #3050425 11/28/20 10:06 AM
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Originally Posted by QuasarPiano
It began when i start to use external speakers using the headphone plug. [...] Internal speaker has the noise.

Aren't the internal speakers cut off when you plug in something into the headphone jack?

Re: White noise
Pete14 #3050446 11/28/20 11:07 AM
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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!

"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.

Re: White noise
clothearednincompo #3050447 11/28/20 11:07 AM
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Originally Posted by clothearednincompo
Originally Posted by Pete14
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:


blush

Re: White noise
pppianomarc #3050462 11/28/20 11:51 AM
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Originally Posted by pppianomarc
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. wink


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Re: White noise
Frédéric L #3050478 11/28/20 12:32 PM
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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. wink

Re: White noise
QuasarPiano #3050631 11/28/20 07:26 PM
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Just discovered that the noise is still there also with knob of the volume at the minimum. How is that possible?

Re: White noise
QuasarPiano #3050682 11/28/20 10:17 PM
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Noise that's integral to the amplifier.


If you're a zombie and you know it, bite your friend!
We got both kinds of music: Country and Western!
Casio Celviano AP-650
Re: White noise
FrankCox #3050733 11/29/20 02:33 AM
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Originally Posted by FrankCox
Noise that's integral to the amplifier.

+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.


. Charles
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PX-350 / microKorg XL+ / Pianoteq

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