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Volca Keys phase cancellation issue

 
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Cardindex



Joined: 19 Jul 2021
Posts: 5

PostPosted: Mon Jul 26, 2021 3:42 am    Post subject: Volca Keys phase cancellation issue Reply with quote

I’m a new Volca Keys user, but I made the mistake of hooking my Volca up to a guitar pedal using a 3.5mm TRS out of the headphone input to a 1/4” TRS adapter in the pedal.

I not only got a weak signal (phase cancellation?), but now the poor signal persists WITHOUT the aforementioned cable or pedal. It’s barely audible on the internal speaker and with headphones I can hear a little signal, but mostly noise. Both the speaker and the headphones sounded fine before I hooked up the pedal. Why is this and how can I fix it?

Thanks for any advice on this.
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OpAmp
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Joined: 07 Jun 2013
Posts: 1173
Location: Brussels, BE

PostPosted: Wed Jul 28, 2021 8:43 pm    Post subject: Reply with quote

Hi,

Sounds like that the hooking up on the pedal has damaged your unit somehow.
I would think it is protected vs. wiring mistakes, but not sure on that.
Get it to a repair center. Not sure they are gonna fix it though...

Good luck
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Cardindex



Joined: 19 Jul 2021
Posts: 5

PostPosted: Thu Jul 29, 2021 1:16 am    Post subject: Reply with quote

Thanks, yes. That's what I feared. The only problem is finding a repair center that would even look at it. I've struck out with all the local shops in my area. Rolling Eyes
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slug
Senior Member


Joined: 03 Aug 2007
Posts: 370

PostPosted: Thu Jul 29, 2021 1:27 am    Post subject: Re: Volca Keys phase cancellation issue Reply with quote

Cardindex wrote:
I’m a new Volca Keys user, but I made the mistake of hooking my Volca up to a guitar pedal using a 3.5mm TRS out of the headphone input to a 1/4” TRS adapter in the pedal.

I not only got a weak signal (phase cancellation?), but now the poor signal persists WITHOUT the aforementioned cable or pedal. It’s barely audible on the internal speaker and with headphones I can hear a little signal, but mostly noise. Both the speaker and the headphones sounded fine before I hooked up the pedal. Why is this and how can I fix it?

Thanks for any advice on this.

I can't think of any way connecting the Volca output to an input could harm anything in the Volca. May be a fault unrelated to what you were doing, or it is the output jack itself broken when using it. They are only tacked onto the board so definitely a weak point.
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ShoNuff
Full Member


Joined: 27 Oct 2014
Posts: 221

PostPosted: Thu Aug 05, 2021 2:48 pm    Post subject: Reply with quote

i accidentally ran my Keys on 19v for about half an hour, and it didn't mind at all Shocked

although i wouldn't recommend trying to reproduce that (it was a power supply with same yellow tip, accidently connected to the wrong one).
(mind you it was a supply that came to me with a 2nd hand Kick, was a bit shocked when i looked at the rating, but the Kick is fine too.)

i think if you run that stereo output into a balanced input you're going to have the cancellation issue. try connecting just one side by splitting it out with one of those 1/8" stereo-to-2x RCA cables.
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OpAmp
Platinum Member


Joined: 07 Jun 2013
Posts: 1173
Location: Brussels, BE

PostPosted: Thu Aug 05, 2021 8:35 pm    Post subject: Reply with quote

Note that the problem is not only on the headphone output, but also on the internal speaker.
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microKORGXL, Kaossilator Pro, monotribe, SQ-1, volca fm, Kross 88 BK
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