2017 was our 20th year online!

Welcome to the Piano World Piano Forums
Over 3 million posts about pianos, digital pianos, and all types of keyboard instruments.
Over 100,000 members from around the world.
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Shop our online store for music lovers
SEARCH
Piano Forums & Piano World
(ad)
Best of Piano Buyer
 Best of Piano Buyer
(ad)
Pianoteq
Steinway Spiro Layering
(ad)
Wessell Nickel & Gross
PianoForAll
Who's Online Now
30 members (DPAfficionado, AlphaBravoCharlie, David B, djvu10, CyberGene, FloRi89, Evgeny 85, brennbaer, 7 invisible), 788 guests, and 468 robots.
Key: Admin, Global Mod, Mod
(ad)
Estonia Pianos
Estonia Pianos
Previous Thread
Next Thread
Print Thread
Hop To
Page 2 of 2 1 2
Joined: Dec 2012
Posts: 6,356
C
6000 Post Club Member
Offline
6000 Post Club Member
C
Joined: Dec 2012
Posts: 6,356
Originally Posted by M.Schreck
I was told that a USB cable with ferrite bead can also remove the ground loop/noise.
Has anyone tried it? Is it true?


I think it's not _likely_. Ferrites are quite effective at getting rid of _radio-frequency_ interference. I'm a ham radio operator, and I use lots of them on "signal-level" wiring -- especially USB cables and mic cables.

But they're not very effective at getting rid of 60-Hz "line noise" -- also called "hum". That tends to be picked up by audio cables (not USB cables).

The cure is usually to break the "ground loop" by interrupting the continuity of the common ground connection among several pieces of equipment. You can do that by using a "DI box" (either transformer-coupled ("passive") or "active"). Or you can design gear that uses "balanced wiring", which doesn't need ground connections.

When headphones _don't_ pick up hum, and an amp _does_ pick up hum, the problem is probably not with the sound card. It's in the connection to the amp, and a ground loop is the most likely cause.

If you Google:

"ground loop" hum cause

there are many hits.

. Charles


. Charles
---------------------------
PX-350 / microKorg XL+ / Pianoteq
Joined: Nov 2009
Posts: 286
E
Full Member
Offline
Full Member
E
Joined: Nov 2009
Posts: 286
Hello
I am experiencing same problems, and a hum destroyer is not a good solution
Can someone tell me if replacing the USB-to-Host cable with a MIDI (USB-MIDI) cable would help ?

Thanks for your help



Music is a lifestyle
(Happy Yamaha N2 and Roland FP90 owner)
Joined: Aug 2009
Posts: 1,204
E
1000 Post Club Member
Offline
1000 Post Club Member
E
Joined: Aug 2009
Posts: 1,204
Originally Posted by emenelton
Another common solution is to modify your line level cables to break the ground at the plug that connects to the line in on your midi keyboard. You will have to modify both the left and right one.


enzo,

The adapter probably won't help. What is happening is the ground plane from the computer side is getting into the ground plane on the audio side. Believe it or not the description above is a standard fix that might work.

kumi's suggestion on the ground of the usb cable is similar.

Joined: Mar 2013
Posts: 48
A
Full Member
Offline
Full Member
A
Joined: Mar 2013
Posts: 48
Some makers would rather process a few returns than implement QC at the fab or put shielding in the device.

Page 2 of 2 1 2

Moderated by  Piano World 

Link Copied to Clipboard
(ad)
Faust Harrison Pianos
Faust Harrison 100+ Steinway pianos
(ad)
PianoDisc

PianoDisc
(ad)
Piano Life Saver - Dampp Chaser
Dampp Chaser Piano Life Saver
(ad)
Mason & Hamlin Pianos
New Topics - Multiple Forums
Break-ups are hard
by Athdara - 06/24/21 11:54 PM
(Question) VST-applied MIDI and live-recorded VST
by Saberlarry - 06/24/21 11:39 PM
Trying to identify the maker of my old piano
by PianoLover90 - 06/24/21 11:30 PM
Haunted Piano !?!
by Retsacnal - 06/24/21 07:34 PM
Do you have this problem with Steinway?
by RonaldSteinway - 06/24/21 06:38 PM
Download Sheet Music
Virtual Sheet Music - Classical Sheet Music Downloads
Forum Statistics
Forums42
Topics207,690
Posts3,107,053
Members101,897
Most Online15,252
Mar 21st, 2010
Please Support Our Advertisers

Faust Harrison 100+ Steinways

Dampp Chaser Piano Life Saver

 Best of Piano Buyer

PianoTeq Bechstein
Visit our online store for gifts for music lovers

Virtual Sheet Music - Classical Sheet Music Downloads



 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
| Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | MapleStreetMusicShop.com - Our store in Cornish Maine


© copyright 1997 - 2021 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission
Powered by UBB.threads™ PHP Forum Software 7.7.5