Random loss of sound output last night at bar.

navydave · Post by **navydave** » Fri Jan 30, 2015 3:59 pm

Happened 2 times. Went to play out at an open mic. Had my left output going to a powered monitor, and right audio output going to the mixing board. Booted the Kronos, had sound. Waited a minute. Touched the keyboard again, no sound. Nothing sound from monitor or board. Rebooted Kronos, sound comes back. Go on break leaving everything on. Come back from break, no sound. Turn off Kronos, turn on Kronos, sound is back. Played fine rest of night.

Nothing was connected to midi. Just had sustain pedal and volume pedal hooked up. Both times I tried disconnecting both and reseating 1/4in cables to audio. Tried changing to another program, another combi. No dice. Rebooting brought the sound back. This is the first time this has happened since OS 3.0.2.

Any thoughts? I am assuming poor power at the club? Would low or sketchy power cause this type of behavior?

Davd C. Polich · Post by **Davd C. Polich** » Fri Jan 30, 2015 4:08 pm

That sure sounds like faulty cables to me. You should always have spare
cables. Don't just re-seat the ones you are using.

U have to eliminate all variables. It could also be channels on your mixer that you are connected to, or if you are running into a D.I., it could be the D.I. If it's the mixer, try switching to different channels.

I've had mixer channels go bad, audio cables go bad, D.I.'s go bad. And
sometimes all at the same time.

navydave · Post by **navydave** » Fri Jan 30, 2015 4:12 pm

Davd C. Polich wrote:That sure sounds like faulty cables to me. You should always have spare
cables. Don't just re-seat the ones you are using.

U have to eliminate all variables. It could also be channels on your mixer that you are connected to, or if you are running into a D.I., it could be the D.I. If it's the mixer, try switching to different channels.

I've had mixer channels go bad, audio cables go bad, D.I.'s go bad. And
sometimes all at the same time.

Possible, but both cables? And then its fine by just rebooting? I do have spares but didnt think both cables would be bad at the same time. I suppose its possible. One cable was going to a solo powered monitor (left) and (right) going to board. Will try fresh cables next time.

Davd C. Polich · Post by **Davd C. Polich** » Fri Jan 30, 2015 4:14 pm

Well, does your Kronos work fine at home? If it does, then yes you have
faulty cables or bad mixer channels or a bad D.I.

Dniss · Post by **Dniss** » Fri Jan 30, 2015 4:18 pm

Had the same problem last week at home.

Went to get a coffee and on my return I had no sound. Eveything appeared to work, except I had no sound.

I rebooted the K and I had sound again.

Davd C. Polich · Post by **Davd C. Polich** » Fri Jan 30, 2015 4:21 pm

Dniss wrote:Had the same problem last week at home.

Went to get a coffee and on my return I had no sound. Eveything appeared to work, except I had no sound.

I rebooted the K and I had sound again.

Well then, time for a trip to the authorized service center.

navydave · Post by **navydave** » Fri Jan 30, 2015 4:21 pm

Davd C. Polich wrote:Well, does your Kronos work fine at home? If it does, then yes you have
faulty cables or bad mixer channels or a bad D.I.

Yes, works fine at home, but the thing that gets me is, no sound (all cables in place), reboot (without touching any cables) and sound is back. Maybe the internal jacks are sketchy? (Another possibility)? Or these particular cables aren't engaging the internal contacts as well as the ones at home? Will bring cables from home next time. if happens again, will swap out to see if any change.

navydave · Post by **navydave** » Fri Jan 30, 2015 4:31 pm

Dniss wrote:Had the same problem last week at home.

Went to get a coffee and on my return I had no sound. Eveything appeared to work, except I had no sound.

I rebooted the K and I had sound again.

Is this a new behavior (with all factors/equipment/cables the same) after upgrading to 3.0.2? Just curious.

enigmahack · Post by **enigmahack** » Fri Jan 30, 2015 4:39 pm

navydave wrote:
Dniss wrote:Had the same problem last week at home.

Went to get a coffee and on my return I had no sound. Eveything appeared to work, except I had no sound.

I rebooted the K and I had sound again.
Is this a new behavior (with all factors/equipment/cables the same) after upgrading to 3.0.2? Just curious.

Do you remember when you tried to play if the VU meters were showing any "internal" output? Like if the software was registering that sound was happening. If so, then you at least know it's between the software output and D/A converter board or further. If there was no MIDI plugged in at all, it sure sounds like software. If it was only one channel then I'd lean more towards a cable but the reboot shows it's clearly a software/hardware issue that isn't a cable.

I'd be wondering if there is a capacitor that was sensitive to the power levels on the D/A board... The capacitor "overcharges" (forgive my lack of descriptive abilities, I'm not an engineer) and faults prevents output through those channels. Rebooting might remove power and the couple of minutes it takes to reboot gives a chance for components to cool down.

Either way, sounds like a service center trip to me too.

scottgblood · Post by **scottgblood** » Fri Jan 30, 2015 4:51 pm

korg haven't gone and left the screen saver settings or power settings of the underlying os active have they lol

HardSync · Post by **HardSync** » Fri Jan 30, 2015 8:50 pm

navydave wrote:Had my left output going to a powered monitor, and right audio output going to the mixing board.

This is an unusual setup, if indeed you mean the L/R outputs. The L/R outs are a stereo pair when both outs have cables connected. This would mean that the monitor gets half of the stereo signal and the mixing board gets the other half. Do you setup this way often?

techeverlasting · Post by **techeverlasting** » Fri Jan 30, 2015 9:09 pm

This does not sound like faulty cables. Two cables failing at the same time, and then suddenly working again after a reboot?

It's helpful to keep a set of headphones when this sort of thing happens, as this will tell you right away if the sound engine is working and if there's a problem with the audio after it leaves the synth. Plus you can always take audio out of the phones in a pinch.

navydave · Post by **navydave** » Fri Jan 30, 2015 9:34 pm

HardSync wrote:
navydave wrote:Had my left output going to a powered monitor, and right audio output going to the mixing board.
This is an unusual setup, if indeed you mean the L/R outputs. The L/R outs are a stereo pair when both outs have cables connected. This would mean that the monitor gets half of the stereo signal and the mixing board gets the other half. Do you setup this way often?

Sometimes, for just a quick and dirty setup. My monitor was behind me and pointed out towards the crowd and loud enough that the audience would hear both halves of the stereo mix. (or summed I should say)

navydave · Post by **navydave** » Fri Jan 30, 2015 9:41 pm

enigmahack wrote:
navydave wrote:
Dniss wrote:Had the same problem last week at home.

Went to get a coffee and on my return I had no sound. Eveything appeared to work, except I had no sound.

I rebooted the K and I had sound again.
Is this a new behavior (with all factors/equipment/cables the same) after upgrading to 3.0.2? Just curious.
Do you remember when you tried to play if the VU meters were showing any "internal" output? Like if the software was registering that sound was happening. If so, then you at least know it's between the software output and D/A converter board or further. If there was no MIDI plugged in at all, it sure sounds like software. If it was only one channel then I'd lean more towards a cable but the reboot shows it's clearly a software/hardware issue that isn't a cable.

I'd be wondering if there is a capacitor that was sensitive to the power levels on the D/A board... The capacitor "overcharges" (forgive my lack of descriptive abilities, I'm not an engineer) and faults prevents output through those channels. Rebooting might remove power and the couple of minutes it takes to reboot gives a chance for components to cool down.

Either way, sounds like a service center trip to me too.

I don't remember (about meter levels) but I will pay attention next time. I have a hunch it could be power related. I was on the same circuit as the powered mixer. I have it at home now and it is working fine.

I have a gig tonight. I will bring my battery backup/conditioner to rule out any power related issues (which I am always plugged into at home). A few years ago I remember playing a gig up in northern Maine at an outdoor white water rafting resort and the power was very poor. I had a Triton Le at the time and ran backing tracks. The first time we played there, the Triton played back the tracks erratically, with audio output issues and tempo issues. The next time I played at the same venue, I brought my battery backup and the Triton performed flawlessly.

I will use the same cables tonight with the backup plugged in and see how it goes. I also have some spare cables to try also.

navydave · Post by **navydave** » Fri Jan 30, 2015 9:44 pm

techeverlasting wrote:This does not sound like faulty cables. Two cables failing at the same time, and then suddenly working again after a reboot?

It's helpful to keep a set of headphones when this sort of thing happens, as this will tell you right away if the sound engine is working and if there's a problem with the audio after it leaves the synth. Plus you can always take audio out of the phones in a pinch.

Thanks for the tip. I will try that if it happens again.

Korg Forums

Random loss of sound output last night at bar.

Random loss of sound output last night at bar.

Re: Random loss of sound output last night at bar.

Re: Random loss of sound output last night at bar.