Nord User Forum

I've owned multiple Nord keyboards over the past 10 - 12 years (Electro 2, Electro 3, Lead, Piano). I've never experienced any audible hum/buzz. I recently upgraded my Electro 3 to 5D, and it definitely has an audible hum/buzz. I believe it to be the display, not the power supply. I wish that it didn't, but it doesn't actually impact anything that I do with the keyboard.

An interesting theory. When I put my ear close to the display I can definately hear a high-frequency buzzing from it. However, the sound that I hear from my playing position is a low-frequency humming. Maybe they are two different things.

Hi,
I had an Electro 5, absolutly no hum. Not any noise.
Keybed was noisy but it's an other story.
Now I have a Piano 3 and it hummmmmmmssss.
No explanations for that.
I should have keep the no hum Electro 5... It seems to be a collector...

Cheers
De fursaK

After 2 years the hum still annoys me here and there when I use it at home. When I turn it on. When I turn it off. In between I am way too busy making awesome music to even notice it. Completely unoticeable in a stage or practice room setting.

Groovy wrote:An interesting theory. When I put my ear close to the display I can definately hear a high-frequency buzzing from it. However, the sound that I hear from my playing position is a low-frequency humming. Maybe they are two different things.

Probably just the way the humming changes with your perspective, you're hearing different overtones from different reflections as you move away from it.

c0wfunk wrote:

Groovy wrote:An interesting theory. When I put my ear close to the display I can definately hear a high-frequency buzzing from it. However, the sound that I hear from my playing position is a low-frequency humming. Maybe they are two different things.

Probably just the way the humming changes with your perspective, you're hearing different overtones from different reflections as you move away from it.

OLED displays sometimes employ a charge pump to generate the higher voltages needed to drive the display elements. These charge pump circuits often have audio-band harmonics. I think there's two different sources (1. Display, 2. Main Power).
I agree with you about how positioning/perspective change what you hear.

My Electro 673D also has a slight hum from the internal power supply. Nord should look into this although it has no effect on the amplified sound be it through an amplifier or headphones. Just annoying.