Low Hum From the MPC1000

[Sanova]

(From my post on MPC forums)
I have my MPC1000 Connected to my M Audio Mobile Pre USB Interface.
The Cables I use are Monter Prolink 12 ft. cables, with the 24k gold plated tip or whatever.

I have isolated it down to this:

The hum only occurs when the AC cable is connected to the mpc. Even when the MPC is powered off. When I remove the AC Cable (power cord) The hum immediately stops, and vice versa.

I can not afford any power conditioners and the Hum-X thing i was reading about. I have been saving for a long time, and getting donations to have the aforementioned equipment and cables.

(Also, when I connected the Cables from my MPC into my Eurorack UB2222Pro-FX mixer, the hum was even more audible.

Can someone please help, if possible?

I used the search function and tried everything that was even related, to no avail.

No cables and AC cords are running parallel, I even made sure that my cables aren't even touching any other electronics that they are not connected to. I tried plugging the MPC into a surge protector, and straight into the wall, no luck.

Please help. Thanks.

-Sanova

 

[bigdmakintrax]

Ok well look it could be that the AC circuits and outlets where you live have a floating or improper ground, if you have taken the MPC to more than one outlet in your house with the same result, then I advise you to take your MPC to some other places besides your house and test this, the only thing I can think is if its not the AC source, then you have a problem with the circuits that make up the main board of the Sampler ???

 

[Sanova]

I don't think the sampler is the problem, however its always a possibility.

I tried plugging it into another circuit breaker with the same result (i think it was even louder).

this isn't much of a problem right now besides being annoying, cuz i'm still in the learning process of the mpc.. but when i get into recording beats its gonna suck..

 

[Relic]

Thats REALLY weird , you have already covered everything I can think of that could be causing it....

 

[NobleWordz]

12ft cable? from personal experience, the longer the cable the lower the quality.

 

[Sanova]

12ft cable? from personal experience, the longer the cable the lower the quality.

Could be the casem because the outs of the mpc are unbalanced for some reason. So long cables do tend to introduce unwanted noise.
I will exchange them for the 6ft cables tomorrow (the cables are so expensive, its only a 5 dollar price drop)

 

[open mind]

man thats a bad start with your new toy good luck mayne i hope the new caples will fix your prob mayne.

 

[MarkN]

i would have thought theres sumthing not connecting quite rite it could be the cable or it could be a fault with the MPC outs ! so try new cables like your planning on doing or try plugging another piece of gear if you or your m8s have got sumthing to see if that hums or not ?

 

[afriquedeluxe]

the mpc1000 doesnt have spdif or digital out? from my experience you never get hums with these.

 

[KurtisRich]

yea try using the spdif output ..... if that doesn't help then i duno... maybe change the cables....?

 

[Ash Holmz]

take it to a friends house ..if it has the same problem it maight be something wrong with the actual mpc .. but yeah use the spif digital outs they actually sound better too

 

[Sanova]

where would i plug the digital out into..

my soundcard doesn't have a s/pdif in. just 1/4's and xlrs'

my mixer has a tape input, but i dont think thats the same

 

[open mind]

where would i plug the digital out into..

my soundcard doesn't have a s/pdif in. just 1/4's and xlrs'

my mixer has a tape input, but i dont think thats the same

if your soundcard doesnt have the S/PDIF-IN u FUCKED! u need to buy one that has S/PDIF-IN.or a S/PDIF-IN module like this:

http://www.creative.com/products/product.asp?category=1&subcategory=16&product=1780

 

[Sanova]

Fixed it

 

[misscc803]

What was your solution?

Nicole

 

[open mind]

yes nova what was the solution tell us.

 

[w2thag]

UP!!!!

I got the same problem here! What is the solution to this problem???

 

[Relic]

One could always purchase "X-Hum" from sweetwater.

And where the hell IS Sanova??

 

[Sanova]

Hey sorry i never got back to this, kinda lost track of the thread.

but anyway for anyone who has this problem, it is caused by electrical current. Audio wires and Power cables should pretty much never cross paths UNLESS they intersect at 90 degree angles keeping each electric current separate and intact.

If audio and power cables run parallel on regular house electricity this will result in "noise" (or buzz w.e) because the current is linear allowing electrons to jump from their current location (which is what they do, and it causes light) but we dont want this jumping from its main current for aforementioned reasons.

Hope that helps,

cheers.