Juno DS issue : high pitch resonnance with microphone

[Rascal]

Hi everyone,

I have this issue with my DS that when I use the microphone, I get this weird high pitch resonance with makes it unusable.

I tried a Shure SM57 and SM58 with a XLR to 1/4 inch adapter, and also with a cable that is XLR to 1/4 and I keep having this problem.

The vocoder works fine though so I can at least use that function.

Any idea of what causes this?
Thanks!

 

[happyrat1]

Check your local and global FX.

Gary

 

[Rascal]

Thanks Gary,

Is the local/global FX in the effects menu?

Any specific tab/setting I should take a look at? I tried playing with the input mic volume and reverb send in System settings / microphone but nothing seems to help.

P

 

[happyrat1]

I sold my DS a year ago.

Check the manual.

Gary.

 

[happyrat1]

Did you adjust the input volume knob on the back properly?

Gary.

 

[Rascal]

Yeah don’t worry, I studied both manuals and didn’t find the answer, that’s why I’m posting here. Wondering if it has anything to do with the mics I’m using or some obscure settings I could’ve missed.

And yes, I tried adjusting both the knob in the back and the mic fader. There either is no sound or that wild resonance.

But thanks man!

 

[happyrat1]

What's your monitor/mic layout?

Feedback maybe?

Gary

 

[happyrat1]

Is the mic omnidirectional or cardioid pattern?

 

[Rascal]

Both were cardioid dynamic microphones.
Feedback is a good hypothesis but I also had the problem with headphones (layout: mic-keyboard-mixer-headphones)

P

 

[happyrat1]

Maybe contact Roland. Could be a warranty issue.

Gary

 

[happyrat1]

One more brain fart.

Check your EQ settings.

Gary

 

[Rascal]

Thanks Gary!

 

[BernieA]

It most likely is feedback. Make sure your mic is not in a direct line to the speakers, and/or lower the volume.

 

[tommy7man]

I have similar issues with various gear when a USB cable AND a Power Cable are both plugged in.
Suggestion 1: try disconnecting the computer power adapter. If there's no computer in the situation, can you try the DS on batteries, just to see if the squeal disappears?
Suggestion 2: It seems you have ruled this out by trying different connections to the mic, but has it always been the same mic cable itself? It may be that, unless you've used a few different mic cables, regardless of the adaptors. Sorry I can't be more helpful!

 

[Rascal]

Thanks for the reply. I don’t think it’s just a feedback problem though because I have the same problem with headphones and I don’t hear the microphone signal (or I hear it at very low volume). I believe it’s probably a problem with the keyboard.

 

[Rascal]

I have similar issues with various gear when a USB cable AND a Power Cable are both plugged in.
Suggestion 1: try disconnecting the computer power adapter. If there's no computer in the situation, can you try the DS on batteries, just to see if the squeal disappears?
Suggestion 2: It seems you have ruled this out by trying different connections to the mic, but has it always been the same mic cable itself? It may be that, unless you've used a few different mic cables, regardless of the adaptors. Sorry I can't be more helpful!

Thanks! There was no connection to the computer but I will try it on batteries. I did experiment with different mic cables and had the same issue.

 

[Rascal]

What is weird with this situation is that the vocoder works perfectly fine

 

[happyrat1]

Like Tommy said, it could be some sort of ground loop issue, or internal resistance noise from a faulty solder joint on an internal component. That woulds be a warranty issue.

One more question, have you tested both mics plugged directly to an amp? Unlikely but both mics could be bad as well.

Doesn't take much to damage a mic. One good drop to a wood or tile floor can do it.

Gary

 

[Rascal]

The bad guy

Oh I’m so happy! I found the problem, with this community’s good advices. The problem was that I used a XLR-TRS adaptor (see photo).

It’s weird because someone handed me a proper XLR-TRS cable before and it didin’t seem to work but I just bought a new 3 ft XLR-TRS and the mic works perfectly now.

Thanks all!

 

[happyrat1]

That's a Eureka Moment if I ever heard one.

Congrats.

Gary