Emu XL-7 & MP-7 User's Group

Hi,

Just purchased a E-mu PX-7 from Guitar Center. I couldn't resist the 
cheap price. I brought it home today and hooked it up to my Peavey 
Amp. I noticed a loud humming noise. I checked the patch cable. My 
Amp was fine, because my other gear connecting to it were fine. I 
changed patch cables, plugged it into another channel. Same problem. 
I also tried plugging the cable into all of the outputs on the back 
on the PX-7. I still got that damn loud humming noise. I then 
removed the cable from the unit and I hooked up some headphones to 
the PX-7. No problems there. It worked fine. I was thinking about 
bringing it back to Guitar Center at this point. The only thing left 
to change was the power cord. I figured what the hell. I grabbed a 
power cord from one of my PCs and plugged it into the PX-7. Presto! 
The humming noise was gone. Bizarre. Did I have a faulty power cord? 
Has anyone else had this problem? Anyway, the unit is working fine 
now. So far, I'm very impressed with the PX-7. I'm looking forward 
to really diving into this thing. Right now, I'm just getting used 
to the basics. I'm looking to create some dance music with this 
thing.

Here is my current hardware gear:
E-mu PX-7
Korg Karma w/EXB-PCM08
Korg Wavestation
Yamaha An1x

I've been doing some serious downsizing with my equipment. I had too 
much stuff and I was running out of space. In fact, I traded in my 
Korg MS2000, Yamaha TX81Z, and Boss SP-202 sampler for the PX-7 
today.

Last question,
Can the PX-7 control my other synths (Karma,Wavestation,AN1X)?

Thanks,
Domenic

Did I have a faulty power cord?

>>>Sounds like it.  <<<

Last question,
Can the PX-7 control my other synths (Karma,Wavestation,AN1X)?

>>>Yes. <<<

rEalm



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That is weird.  I am having the same issue on my MP-7.  I will try 
changing out the power cord tonight, but I am not sure that is what 
my problem might be.  

Can someone recommend to me how to remove the ground loop from my 
equipment.  I think that is where I am getting my noise from.

thanks,

--- In xl7@yahoogroups.com, "quebec88" <quebec88@y...> wrote:
> Hi,
> 
> Just purchased a E-mu PX-7 from Guitar Center. I couldn't resist 
the 
> cheap price. I brought it home today and hooked it up to my Peavey 
> Amp. I noticed a loud humming noise. I checked the patch cable. My 
> Amp was fine, because my other gear connecting to it were fine. I 
> changed patch cables, plugged it into another channel. Same 
problem. 
> I also tried plugging the cable into all of the outputs on the 
back 
> on the PX-7. I still got that damn loud humming noise. I then 
> removed the cable from the unit and I hooked up some headphones to 
> the PX-7. No problems there. It worked fine. I was thinking about 
> bringing it back to Guitar Center at this point. The only thing 
left 
> to change was the power cord. I figured what the hell. I grabbed a 
> power cord from one of my PCs and plugged it into the PX-7. 
Presto! 
> The humming noise was gone. Bizarre. Did I have a faulty power 
cord? 
> Has anyone else had this problem? Anyway, the unit is working fine 
> now. So far, I'm very impressed with the PX-7. I'm looking forward 
> to really diving into this thing. Right now, I'm just getting used 
> to the basics. I'm looking to create some dance music with this 
> thing.
> 
> Here is my current hardware gear:
> E-mu PX-7
> Korg Karma w/EXB-PCM08
> Korg Wavestation
> Yamaha An1x
> 
> I've been doing some serious downsizing with my equipment. I had 
too 
> much stuff and I was running out of space. In fact, I traded in my 
> Korg MS2000, Yamaha TX81Z, and Boss SP-202 sampler for the PX-7 
> today.
> 
> Last question,
> Can the PX-7 control my other synths (Karma,Wavestation,AN1X)?
> 
> Thanks,
> Domenic

Really hard to suggest how to get rid of a ground loop, as it's largely 
dependant on what gear you have, how it's laid out, etc.  I would suggest 
unplugging things one by one to see if youc an narrow down what the 
culprit is, and of course trying a new power cord too.

rEalm




That is weird.  I am having the same issue on my MP-7.  I will try 
changing out the power cord tonight, but I am not sure that is what 
my problem might be. 

Can someone recommend to me how to remove the ground loop from my 
equipment.  I think that is where I am getting my noise from.

thanks,


 






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to which it is addressed and may contain confidential and/or legally 
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the intended recipient(s) is not intended in any way to waive privilege 
or confidentiality. Any review, retransmission, dissemination or other 
use of, or taking of any action in reliance upon, this information by 
entities other than the intended recipient is prohibited. If you 
receive this in error, please contact the sender and delete the 
material from any computer.

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[Non-text portions of this message have been removed]

> Really hard to suggest how to get rid of a ground loop

No, really easy:

EbTech Hum Eliminators. These things WORK! Also, the new HumX is great.

-m@

i live in argentina, in many ocassions you dont have grounded electric 
system, and ive had some problems too, the worst thing in the studio 
generating this kind of problems is probably your computer monitor, mine 
was, and everything in the electric circle i touched was electificated...
i grounded my studio by putting an earth cable to a the water instalations, 
problem resolved -
of course the water instalations must be made by plum... if you dont have 
such recourses you have to put an ordinary construction steel in the earth 
[around 1 meter, at least] and conect your earth cable there.
But i dont know if that is what you ment......


>Can someone recommend to me how to remove the ground loop from my
>equipment.  I think that is where I am getting my noise from.

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