A high pitched ringing sound

FigureofFiend · Post by **FigureofFiend** » Sat Dec 29, 2007 11:45 am

Didn't wanna bother you guys with a (hopefully) silly question like this, but I browsed the forums and I can't seem to pin it down.

Since I first started using the triton some while back, when I first turn it on there are a series of hums and rings as it loads, then a constant ring that stays throughout. It's pretty unnoticeable while playing, but its prominent when I'm silent through amps and recording. I could of sworn I saw something about this in the manual and how to easily get rid of it when I read it a while back...

...I get the feeling I just missed a vital 'first step' when I bought it to correcting this and have been lazy & ignoring it.

Anyways, anyone mind pointing me in the general direction of how to take care of this? Or a simple walk through would be even better.

Or if this is uncommon....HELP!

GregC · Post by **GregC** » Sat Dec 29, 2007 1:28 pm

don't place your cell phone on the Extreme

jojo · Post by **jojo** » Sat Dec 29, 2007 3:39 pm

I've experienced that for the longest time. It's really really quiet, but I do hear some noticeable high-pitched noises almost like the kind my MacBook Pro makes when the audio card has nothing to do for a minute (this is true of soooo many intel chipsets).

FigureofFiend · Post by **FigureofFiend** » Sun Dec 30, 2007 7:40 am

hmm...so maybe this question isn't so silly after all...

...does anybody have an explanation as to why it might be doing this

I'm pretty confident it is most likely coming from the keyboard itself.

ideas? questions?

and no its not a cell phone haha.

GregC · Post by **GregC** » Sun Dec 30, 2007 3:42 pm

do you hear the same noise thru the Extreme headphones out jack ?

KrzysiekK · Post by **KrzysiekK** » Mon Dec 31, 2007 10:42 am

Assuming we're talking about same noise - in my configuration it is NOT audible thru hearphones connected directly to TEX and the TOSLINK output is free of that noise. What is strange however: I have 2 independent sources of analog stereo signal connected to my amp (1: soundcard; 2: TEX). When analog output of TEX is connected to amp, I can hear the noise, NO MATTER which source I select on my amp (when monitoring soundcard output, only the highpitched noise generated by TEX is audible, not any signal from TEX itself). Also - sometimes the noise is stronger, sometimes merely audible (I just turned on my TEX for test and now it's silent) and it is not dependent of "Volume" slider position on TEX (the noise level remains the same in all positions). Must be shielding or something.

Best regards,
Krzysiek

Gargamel314 · Post by **Gargamel314** » Tue Jan 01, 2008 9:41 am

I never have that problem, but occasionally when i turn mine on, i hear loud white noise for a few seconds, and then silences. I wonder if this is at all related.

if anything i'd expect a 60Hz hum, but not a high pitched noise. Could it be interference from another device? Have you tried this with all other equipment off?

FigureofFiend · Post by **FigureofFiend** » Thu Jan 03, 2008 9:09 am

I haven't tried plugging in the headphones. I'll listen to that next. I have tried it with all other equipment off before and whatnot. Still makes the noise.

To be honest I have only used and am only familiar with mono output to amp (till I win the lottery or something and can afford other amps and toys haha)...not quite sure what toslink output is?

-I was thinking it may be the output cables in general...but I have used two different keyboard amps that require two different kinds of cables...so I don't think it could be from the amps or cables. Unless ultra high-quality would really cause such a thing...?

-I have played it in multiple places and it does it everywhere, and although the power supplies weren't 'professional', I don't think it would cause the kind of noise I am hearing. This sounds more high pitched and not a bass hum.

-My lazy arse still hasn't added the additional ram (i'm using a naked out-of-box triton without ram, moss, or computer...crazy I know!). I read that If you get the wrong kind or crappy kind it can cause noise. I wonder if perhaps it has to do with ram???

how many TEX owners experience this btw.

KrzysiekK · Post by **KrzysiekK** » Thu Jan 03, 2008 4:27 pm

The nature of noise may differ in my and your case. Lately I turned on Triton and it was quite noticable (yes, it DOES sound like an interference but I can't localize the source, may be connected with grounding problem in my installation as well; btw. cheap soundcards tend to make such a noise) and I didn't noticed when the noise somehow faded out, and the output was free of it. So it is not constant presence of the noise. Its intensity changes when cycling between different modes (once again similar behaviour to cheap soundcards, prone to interferences from video adapter), therefore once I even had a feeling it is the touchscreen itself lol (btw. where does the "beep" sound come from?).
I am not quite concerned of the problem however because, as I said, I use TOSLINK (S/PDIF optical output on the back of Triton) output for recording, which is completly free of this problem.

-I have played it in multiple places and it does it everywhere, and although the power supplies weren't 'professional', I don't think it would cause the kind of noise I am hearing. This sounds more high pitched and not a bass hum.

if it still present on the output, can You make a short recording and publicate it for comparison?

-My lazy arse still hasn't added the additional ram (i'm using a naked out-of-box triton without ram, moss, or computer...crazy I know!). I read that If you get the wrong kind or crappy kind it can cause noise.

this is other kind of noise (I think). Pure digital problem (like noises in samples). Proper RAM must be used to avoid this problem.

Best regards,
Krzysiek

Koun · Post by **Koun** » Wed Feb 11, 2009 6:14 pm

Hi guys,

This topic is one year old, but I reactivate it as I do have exacty the same problem. High pitched noise always there. I recorded the sound for you, so you can have an idea of it:

http://real-theband.ch/~renaud/divers/bruit_triton.mp3

I notice, as well, that the sound is always there BUT is worse when TEX connected to a computer (iMac) via a soundcard (presonus firebox) and a firewire cable.

Did you find any solution to this problem?
Thanks a lot,
Regards

FigureofFiend · Post by **FigureofFiend** » Thu Feb 12, 2009 6:56 am

this is EXACTLY the SAME sound mine makes! I couldn't ever record the noise because I don't have a recording interface - but indeed the noise is still there.

I'm really curious now to find out what it is...glad you could record this - I was just about to spend $45 just to have it looked at...hopefully somebody knows something ...???

*I tried the headphones and I believe it is not present through that source
**I maxd out the tex with gold ram...but it didn't solve the problem...

although it's at the band practice space, I recall that it stops making the noise momentarily when I use the touch screen

Xenomorph · Post by **Xenomorph** » Thu Feb 12, 2009 8:10 am

Hmmm, I noticed that with mine the other day but if I recall correctly, it was only with a certain combi and only when turning on the valveforce but it was definitely audible(although very quiet).

Koun · Post by **Koun** » Thu Feb 12, 2009 9:09 am

Xenomorph, I'm not sure your noise is the same. Cause we (as I understand it) have a permanent noise to which additional "breath" is added when valve force turned on... I think it is normal that there is a bit more background noise when valve force or powerful effects are on. But this other permanent and high pitched noise is not quite normal...

There are mini changes in the noise when I touch the screen too, as well as when I change a prog through the knob.

Can anybody help? Would it be useful to contact korg about this?

KrzysiekK · Post by **KrzysiekK** » Thu Feb 12, 2009 12:09 pm

For your refference:

1. side by side comparison of analog output (left - Koun; right - Krzysiek). Both normalized to 0dB. On both spectrograms You can see the components at 16kHz, as well as series in range of 0-5000Hz. In my case the harmonics seem to be "modulated" in time while yours are stronger and constant. The small deviations can be of course caused by different recording interfaces and conditions (DSP24VE using direct TEX main L/R->RCA connection here; I recorded w/o lamp). However interesting is your very strong harmonic at ~8kHz which is not present in my setup.

2. the TEX SPDIF Out recorded : I think here we can see how much TEX amp affects the signal. There are still some harmonics present (especially the one at 3kHz - it is present in both analog and digital) but they are audibly not remarkable.

In my setup I audition the analog signal when I just play some programs and want to be sure the valve force is always present. When I do recording, I switch to digital (and use valve force as insert if necessary).

edit1: I forgot to mention - your MP3 file is at 44100kHz while my uncompressed audio is at 48000; this is one of the causes why our spectrum >22kHz differs so much.

edit2: the output produced by TEX sampling (source bus: L/R) is crystal clear (no normalization needed, there is just one digital constant at 0). It is interesting that, according to the manual: "S/P DIF outputs a digital version of the same audio signal as the AUDIO OUTPUT (MAIN) L/MONO and R jacks", so the source is the same as used by TEX sampling. But I think Korg means "same digital data" here rather than internal connections

Best regards,
Krzysiek

Koun · Post by **Koun** » Thu Feb 12, 2009 3:56 pm

Damn, that's beautiful work !

The harmonic at 8kHz is the one I hear most, I think, as it sounds like a B and 8000 Hz is more or less a B (following this source: http://www.indiana.edu/~emusic/hertz.htm )

I didn't try the S/P DIF output as I don't have the needed wire. Anyway, What conclusions to drow with your test? My triton seems to have an anormal harmonic. But does it come from a manufacturing fault or can it be caused by the electric environment? But in this case, why doen't it affect my other keyboard (a Nord Stage) which creates no sound at all...